JP2019074180A - Pipe burying method - Google Patents

Abstract

To provide a pipe burying method capable of preventing a pipe outer surface from being damaged.SOLUTION: A method for burying a pipe 1 includes: an excavation step for excavating the ground 4 to form a groove 5; a sieving step for sieving generation soil 8 generated by excavation into between soil 28 of small particle size of predetermined dimensions or below and soil 29 of a large particle size larger than the predetermined dimensions; a piping step for piping the pipe 1 in the groove 5; a first backfilling step for putting the soil 28 of small particle size into the groove 5 to backfill the place around the pipe with the soil 28 of small particle size; and a second backfilling step for putting and backfilling the soil 29 of large particle size on the layer 31 of the soil 28 of small particle size formed in the groove 5 in the first backfilling step.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a method of burying a pipe in the ground.

  Heretofore, as a method of burying this type of pipe, for example, mixing cement and added water with generated soil generated when excavating the ground to form a ditch and using this mixed soil as a backfilling material Have been described. FIG. 22 is a cross-sectional view when the backfill material 103 is inserted into the groove 102 in which the pipe 101 is disposed and backfilled. The backfill material 103 includes a soil mass portion 104 of the generated soil and a cement milk portion 105. The soil mass portion 104 is dispersed in the cement milk portion 105.

  In addition, the embedding method of the above pipes is described, for example, in Patent Document 1 below.

JP 10-88558

  However, in the above-mentioned conventional type, there is a problem that work is time-consuming because it is a large-scale treatment to mix the generated soil with cement or added water to reform the soil quality at the burial site.

  In addition, when the large-grained stone or the like is contained in the soil mass portion 104, the large-sized stone or the like abuts on the outer surface of the pipe 101, and the outer surface of the pipe 101 is damaged.

  In addition, there is a possibility that large-sized soil lumps 104 may gather around the tube 101, and in this case, there is a problem that the degree of compaction of the backfill material 103 around the tube 101 is insufficient.

  INDUSTRIAL APPLICABILITY The present invention can embed a pipe by a simple and easy operation, can prevent the outer surface of the pipe from being damaged, and can embed the pipe around the pipe by improving the degree of compaction. Intended to provide.

In order to achieve the above object, the first invention is an embedding method for embedding a pipe in the ground,
A drilling process for drilling the ground to form a ditch,
A sieving step of sifting generated soil generated by excavation into soil having a small particle size of a predetermined size or less and soil having a large particle size larger than a predetermined size;
A piping process for arranging a pipe in the groove;
The first backfilling step, in which small particle size soil is introduced into the ditch and the area around the pipe is backfilled with small particle size soil;
A second back-filling step is carried out in which the large-diameter soil is introduced and back-filled on the small-diameter soil layer formed in the grooves in the first back-filling step.

  According to this, since the tube is embedded in the layer of soil of small particle size, the outer surface of the tube does not come in contact with the layer of soil of large particle size, and the outer surface of the tube can be prevented from being damaged. , Improve the degree of compaction around the tube.

  In addition, since the sieving process can be easily performed at the burial site, the pipe can be buried by a simple and easy operation.

  In addition, since the first and second backfilling processes are performed using the generated soil, waste is eliminated, and the amount and cost of processing based on the definition of construction by-products are reduced.

  The pipe burying method according to the second aspect of the present invention is to perform the sieving process while performing the digging process.

  According to this, it is possible to shorten the time required for the pipe laying work.

  The pipe burying method according to the third aspect of the present invention is to perform a paving step of paving a layer of soil of large particle size formed in the groove after the second backfilling step.

  In the pipe burying method according to the fourth aspect of the present invention, the soil on the site is collected and the determination step is performed to determine whether the collected soil can be used for backfilling, before performing the excavation process.

  According to this, when it is determined in the determination step that the collected soil is available for backfilling, the drilling step, the sieving step, the piping step, the first backfilling step, and the second backfilling step are performed. , Bury the pipe.

  In addition, if it is determined in the determination process that the collected soil is not available for backfilling, the ground is excavated to form a ditch, a pipe is disposed in the ditch, and backfilling is collected from another location. A suitable high quality sand is poured into the ditch for backfilling. In addition, the generated soil generated when the ground is excavated is disposed of as a processing amount based on the regulations of construction by-products.

  In the method of embedding a tube according to the fifth invention, the tube is covered with a flexible film-like protective sleeve.

  According to this, since the tube covered with the protective sleeve is embedded in the layer of soil of small particle size, the protective sleeve does not come in contact with the layer of soil of large particle diameter, and the protective sleeve is prevented from being broken can do.

  In the method of burying a tube according to the sixth aspect of the present invention, in the first back-filling step, small diameter soil is introduced into the ditch, and then compacting is carried out around the tube with small diameter soil. The height to the upper surface of the small particle size soil layer is to be equal to or greater than a predetermined finish height.

  This improves the degree of compaction around the tube and increases the stability of the soil around the tube.

  As described above, according to the present invention, the pipe can be embedded by a simple and easy operation, and the outer surface of the pipe can be prevented from being damaged, and the degree of compaction around the pipe can be improved. It is.

It is a figure of the pipe | tube embedded by the embedding method of the pipe | tube in 1st Embodiment of this invention. Similarly, it is a side view of the sieving apparatus and track | truck which are used for the embedding | flush-mounting method, and a mode that the sieving process is performed is shown. It is an XX arrow line view in FIG. FIG. 10 is a side view of the sieving device and the truck used in the embedding method, showing that the sieving process is finished and the truck is advanced to be separated from the sieving device. It is a partially enlarged view of the sieving main body of the sieving device used for the same, the embedding method. It is a flowchart of the burying method of a pipe same as the above. It is sectional drawing of the groove | channel which shows the excavation process of the embedding method of a pipe | tube equally. It is a top view which shows the excavation process and sieving process of the embedding method of a pipe | tube equally. Similarly, it is sectional drawing of the groove | channel which shows the piping process of the embedding method of a pipe | tube. It is a top view which similarly shows the piping process of the embedding method of a pipe | tube. It is sectional drawing of the groove | channel which shows the 1st back filling process of the embedding method of a pipe | tube equally. It is a top view which shows the 1st backfilling process of the embedding method of a pipe | tube equally. It is a top view which shows the 1st backfilling process of the embedding method of a pipe | tube equally. It is sectional drawing of the groove | channel which shows the 2nd backfilling process of the embedding method of a pipe | tube equally. It is a top view which similarly shows the 2nd backfilling process of the embedding method of a pipe | tube. It is sectional drawing of the ditch after performing the pavement process of the embedding method of a pipe | tube equally. It is a top view which shows the excavation process and sieving process of the embedding method of the pipe | tube in the 2nd Embodiment of this invention. It is a top view which similarly shows the piping process of the embedding method of a pipe | tube. It is a top view which shows the 1st backfilling process of the embedding method of a pipe | tube equally. It is a figure which shows the operation | work which is compacting the layer of soil of small particle diameter in the 1st backfilling method of the embedding method of a pipe | tube equally. It is a top view which similarly shows the 2nd backfilling process of the embedding method of a pipe | tube. It is sectional drawing of the groove | channel which embedded the pipe | tube by the conventional embedding | flush-mounting method.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First Embodiment
In the first embodiment, as shown in FIG. 1, 1 is a ductile cast iron pipe buried in the ground, and has an insertion port 1a at one end and a reception port 1b at the other end. The tube 1 is covered with a thin polyethylene protective sleeve 2 which is in the form of a flexible film. Moreover, as shown in FIG. 8, 3 is a backhoe (excavator) which excavates the ground 4 and forms the ditch 5. As shown in FIGS. 2 to 5, 7 is a sieving device 7 for screening generated soil 8 generated by excavation, and 10 and 11 are a plurality of trucks (carrier vehicles) for transporting earth and sand. Each of these trucks 10 and 11 has a loading platform 13 on which soil is loaded.

The screening device 7 has a movable base frame 16 and a vibrating screen 17 mounted on the base frame 16. The base frame 16 has a rectangular upper frame 19, four front and rear right and left leg frames 20 vertically suspended from the upper frame 19, and moving wheels 21 provided at lower ends of the respective leg frames 20. doing.
A space 22 where the loading platform 13 of the truck 10 can go in and out is secured below the upper frame frame 19.

  The vibration sieving machine 17 has a grid-like sieve main body 23, a vibration generator 24 such as a motor for vibrating the sieving main body 23, and a storage box 25 for storing the soil 29 of large particle diameter. The sieve main body 23 is set to an opening M of a predetermined size (for example, 35 mm), and the rear portion is inclined downward than the front portion.

  A method of burying the pipe 1 in the ground using the above-described apparatus will be described below based on the flowchart of FIG.

  The embedding method of the pipe 1 includes a determination step A, an excavation step B, a sieving step C, a piping step D, a first backfilling step E, a second backfilling step F, and a paving step G.

  First, in the determination step A, the soil at the burial site of the pipe 1 is collected, and it is determined whether the collected soil can be used for backfilling (S-1, S-2). As this determination method, the generally known FK method (sieving simple determination method) or the like is used. The FK method is to check the moisture content of the collected soil and the content of fine particles, and to make a determination based on this, which is disclosed, for example, in Japanese Patent Publication No. 56-53419.

  When it is determined in the determination step A that the collected soil is usable for backfilling, the sieving step C is performed while the digging step B is performed (S-3).

  In the excavation process B, as shown in FIGS. 7 and 8, the asphalt covering the ground 4 is peeled off, and the ground 4 is excavated using the backhoe 3 to form a groove 5.

  Further, in the sieving process C, as shown in FIGS. 2, 3 and 8, the sieving device 7 is moved next to the backhoe 3 to lower the track 10 below the vibrating sieving machine 17 of the sieving device 7. The loading platform 13 is inserted. Thereafter, the generated soil 8 excavated by the backhoe 3 is supplied to the vibrating screen 17 and the vibrating screen 17 is operated. Thereby, the sieving main body 23 vibrates and the generated soil 8 is sieved. At this time, the soil 28 having a small particle diameter equal to or smaller than a predetermined size (for example, 35 mm) included in the generated soil 8 passes through the mesh of the sieving main body 23 and is loaded on the loading platform 13 of the truck 10.

  In addition, soil 29 with a large particle diameter larger than a predetermined size (for example, 35 mm) included in generated soil 8 can not pass through sieving main body 23, a part thereof is stored in storage box 25, and the rest is on sieving main body 23 Remain in

  Further, in the case of another truck 11, similarly to the truck 10, the soil 28 having a small particle diameter smaller than a predetermined size included in the generated soil 8 passes through the mesh of the sieving body 23 and is loaded on the loading platform 13 of the truck 11. Ru.

  By performing the sieving process C while performing the excavation process B as described above, the time required for the burying work of the pipe 1 can be shortened.

  Thereafter, in the piping process D, as shown in FIGS. 9 and 10, the plurality of tubes 1 covered with the protective sleeve 2 are lowered to the bottom of the groove 5, and the insertion port 1a is inserted into the socket 1b. Are connected to form a conduit composed of a plurality of tubes 1 in the groove 5 (S-4).

  Next, in the first back-filling process E, as shown in FIGS. 11 to 13, using the backhoe 3, the soil 28 having a small particle diameter is introduced from the bed 13 of each track 10, 11 into the groove 5. , Fill the area around the tube 1 with soil 28 of small particle size (S-5).

  After that, compact around the tube 1 with small particle size soil 28 using a rammer or the like, and determine the height H from the top of the tube to the top surface of the layer 31 of small particle size soil 28 after compaction. The finished height of (eg 30 cm) or more.

  At this time, the large particle size soil 29 remaining in the sieving device 7 and the large particle size soil 29 stored in the storage box 25 are loaded on the empty bed 13 of the empty truck 10.

  Thereafter, in the second backfilling process F, as shown in FIGS. 14 and 15, soil 29 of large particle size is introduced from the bed 13 of the truck 10 into the groove 5 using the backhoe 3 and backfilled. A layer 32 of large grain size soil 29 is formed on the small grain size soil layer 31 (S-6).

  Thereafter, in the paving step G, as shown in FIG. 16, the grain size adjustment crushed stone 34 is laid on the layer 32 of the large grain size soil 29, and the top of the layer 35 of the grain size adjusting crushed stone 34 is paved with asphalt 36 (S -7).

  Since the pipe 1 is embedded in the layer 31 of small particle size soil 28 by the embedding method as described above, the outer surface of the pipe 1 and the protective sleeve 2 never come in contact with the layer 32 of large particle size soil 29 The outer surface of the tube 1 can be prevented from being damaged or the protective sleeve 2 can be prevented from being damaged, and the degree of compaction around the tube 1 is improved, and the stability of the soil 28 around the tube 1 is increased. The degree of compaction is the percentage of the ratio of the dry density of the compacted soil measured at the burial site to the maximum dry density obtained from the compacting test.

  Further, as shown in FIG. 11, in order to backfill around the tube 1 with soil 28 of small particle diameter, as shown in FIG. 9, even if the distance 38 between the tube 1 and the side surface 5a of the groove 5 is narrow The soil 28 of particle size can be sufficiently filled between the tube 1 and the side 5 a of the groove 5. Thereby, the width | variety of the groove | channel 5 can be narrowed and the time which embedding work of the pipe | tube 1 requires can be shortened.

  In addition, since the sieving process C can be easily performed at the site where the pipe 1 is embedded, the pipe 1 can be embedded by a simple and easy operation.

  In addition, since the first and second backfilling steps E and F are performed using the generated soil 8, waste is eliminated and the amount and cost of processing based on the definition of construction by-products are reduced.

  Further, as shown in FIG. 16, since the layer 32 of the large particle size soil 29 is formed between the layer 31 of the small particle size soil 28 and the asphalt 36, even when rainwater infiltrates into the asphalt 36 The drainage when the rainwater passes through the layer 32 of the large particle size soil 29 is improved.

  In the first backfilling step E of the embedding method, the amount of the small particle size soil 28 is insufficient, and the height H from the tube top to the top surface of the layer 31 of the small particle size soil 28 after compaction ( 11) does not reach a predetermined finished height, the above-mentioned height H is finished by performing compaction using a purchased soil having a particle diameter corresponding to the small particle diameter soil 28 in combination. Make it over the height.

  In the above determination step A, when it is determined that the collected soil can not be used for backfilling (S-2), the ground 4 is excavated using the backhoe 3 to form the groove 5 (S-8) And a plurality of pipes 1 are disposed in the groove 5 to connect the pipes 1 with each other, and a pipe line composed of the plurality of pipes 1 is formed in the groove 5 (S-9). After that, a good quality sand suitable for backfilling collected from another place is put into the ditch 5 to backfill (S-10). In addition, the generated soil generated when the ground 4 is excavated is disposed of as a processing amount based on the definition of construction by-products (S-11).

  In the above embodiment, the sieving process C is performed while the drilling process B is performed, but the sieving process C may be performed after the drilling process B is performed.

Although two trucks 10 and 11 are used in the above-mentioned embodiment, one or three or more trucks may be used.
Second Embodiment
In the second embodiment, as shown in FIG. 17, the sieving device 50 has an outer shell 51 movable through a plurality of wheels, and a vibrating sieve 52 provided in the outer shell 51. doing. The vibration sieving machine 52 has a grid-like sieve main body 53 and a vibration generating device such as a motor for vibrating the sieving main body 53.

  In addition, a storage portion for storing the soil 28 with a small particle diameter which has passed through the sieve main body 53 is formed below the sieve main body 53 and inside the outer shell 51. Further, at the bottom of the outer shell 51, a first discharge device for discharging the soil 28 of small particle diameter stored in the storage portion downward is provided.

  Further, at the upper part of the outer shell 51, a second discharge device is provided which discharges the large particle diameter soil 29 remaining on the sieve main body 53 without passing through the sieve main body 53.

  Hereinafter, the embedding method which embeds the pipe | tube 1 in the earth is demonstrated.

  First, in the determination step A, when it is determined that the collected soil can be used for backfilling, the sieving step C is performed while the digging step B is performed.

  In the digging process B, as shown in FIG. 17, the asphalt covering the ground 4 is exfoliated, and the ground 4 is excavated using the backhoe 3 to form a groove 5.

  In the sieving process C, the sieving device 50 is moved next to the backhoe 3, the generated soil 8 excavated by the backhoe 3 is supplied to the sieving device 50, the sieving main body 53 is vibrated, and the generated soil 8 is generated. Sift At this time, the soil 28 having a small particle diameter equal to or less than a predetermined size contained in the generated soil 8 passes through the mesh of the sieving main body 53 and is stored in the storage section in the sieving device 50. In addition, soil 29 having a large particle diameter larger than a predetermined size included in the generated soil 8 can not pass through the sieve main body 23 and remains on the sieve main body 23.

  After the sieving process C is performed while performing the drilling process B as described above, in the piping process D, as shown in FIG. 18, the plurality of pipes 1 covered with the protective sleeve 2 are lowered to the bottom of the groove 5, The pipes 1 are connected to each other to form a conduit composed of a plurality of pipes 1 in the groove 5.

  Next, in the first back-filling step E, as shown in FIG. 19, the small particle diameter stored in the sieving device 50 by the first discharge device while moving the sieving device 50 along the groove 5. The soil 28 is discharged downward and introduced into the groove 5, and the pipe 1 is backfilled with the soil 28 of small particle diameter. Thereafter, as shown in FIG. 20, a layer 31 of soil 28 of small particle size is compacted using a rammer 55 or the like.

  Next, in the second backfilling step F, as shown in FIG. 21, while moving the sieving device 50 along the groove 5, the large-diameter soil remaining on the sieving main body 53 by the second discharging device. 29 is discharged from the sieving device 50 and introduced into the groove 5 to form a layer 32 of large particle size soil 29 on the layer 31 of the small particle size soil 28.

  Thereafter, in the paving step G, the grain size adjusting crushed stone 34 is laid on the layer 32 of the large grain size soil 29 and the top of the layer 35 of the grain size adjusting crushed stone 34 is paved with asphalt 36.

  In the above embodiments, as shown in FIG. 5, the mesh size M of the sieve main body 23 is set to a predetermined size (for example, 35 mm), but may be a size other than 35 mm, for example 20 mm May be

Reference Signs List 1 pipe 2 protective sleeve 4 ground 5 groove 8 generated soil 28 small particle size soil 29 large particle size soil 31 small particle size soil layer 32 large particle size soil layer

According to the present invention, a ductile cast iron pipe can be embedded by a simple and easy operation, and the outer surface of the pipe can be prevented from being damaged, and the degree of compaction around the pipe can be improved. The purpose is to provide a method of burying a pipe.

In order to achieve the above object, the first invention is an embedding method for embedding ductile cast iron pipe in the ground,
A drilling process for drilling the ground to form a ditch,
A sieving step of sieving generated soil generated by excavation into small particle size soil having a predetermined size or less and large particle size soil having a larger size than a predetermined size using a sieving device ;
A piping process for arranging a pipe in the groove;
The first backfilling step, in which small particle size soil is introduced into the ditch and the area around the pipe is backfilled with small particle size soil;
Over the layer of soil having a small particle diameter that is formed in the groove in the first refilling step, we have a second refilling step of refilling by introducing the soil having a large particle size,
In the sieving process, a truck bed is inserted below the vibrating screen of the sieving device, the generated soil is supplied to the vibrating screen, and the small particle size soil contained in the generated soil passes through the mesh of the vibrating screen. Then, while being loaded on the truck bed, soil of large particle size remains in the vibrating screen .

In the pipe embedding method according to the second aspect of the present invention, the sieving device has a base frame and a vibrating screen installed on the base frame
The base frame provides space for access to the truck bed.
In the sieving process, the truck bed is inserted into the space .

In the method of embedding a tube according to the third aspect of the present invention, the base frame has an upper frame and a leg frame suspended from the upper frame.
The space is secured below the upper frame .

In the method of embedding a tube in the fourth invention, the tube is covered with a flexible film-like protective sleeve.

Claims (6)

A method of burying a pipe in the ground,
A drilling process for drilling the ground to form a ditch,
A sieving step of sifting generated soil generated by excavation into soil having a small particle size of a predetermined size or less and soil having a large particle size larger than a predetermined size;
A piping process for arranging a pipe in the groove;
The first backfilling step, in which small particle size soil is introduced into the ditch and the area around the pipe is backfilled with small particle size soil;
And a second back-filling step of charging and back-filling large-diameter soil on the small-diameter soil layer formed in the grooves in the first back-filling step. Method. The method of burying a pipe according to claim 1, wherein the sieving process is performed while the digging process is performed. The method of burying a pipe according to claim 1 or 2, wherein a paving step of paving a layer of large particle size soil formed in the groove after the second backfilling step is performed. The method according to any one of claims 1 to 3, characterized in that the soil on the site is collected and the determination step is performed to determine whether the collected soil can be used for backfilling before performing the excavation process. The method of burying a pipe as described in. 5. A method according to any one of the preceding claims, characterized in that the tube is covered with a flexible film-like protective sleeve. In the first backfilling process, small diameter soil is introduced into the ditch, and then compacted around the tube with small diameter soil, and from the tube to the top of the layer of small diameter soil after compaction. The method of burying a pipe according to any one of claims 1 to 5, wherein the height is set to a predetermined finished height or more.

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