Thrust block manufacturing kit and thrust block manufacturing method

Abstract

To provide a thrust block making kit which enables a thrust block to be constructed with an appropriate capacity even without expert knowledge or precise calculation.SOLUTION: A thrust block making kit includes corresponding data in which the types of combinational panels required for making a predetermined thrust block are identified in association with the hydrostatic pressure on a conduit of a pipeline in which the predetermined thrust block is to be installed.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a thrust block construction kit and a thrust block construction method. [Background technology]

[0002] In pipes containing fluids such as water, such as agricultural pipelines, thrust forces are generated by hydrostatic pressure at points where the fluid flow changes, such as bent sections. When the pipe is laid extending in a substantially horizontal direction, thrust forces are generated in a substantially horizontal direction. In buried pipes buried underground, earth pressure and friction between the soil and the pipe act as reaction forces from the soil, and buried pipes with fluid flowing inside are constantly subjected to the above thrust forces from the inside and the above reaction forces from the soil from the outside.

[0003] Polyvinyl chloride (PVC) pipes, which are widely used in agricultural pipelines, are prone to breakage at joints, bends, and other irregular pipe sections. One of the main causes is that measures to protect against the above-mentioned thrust forces were not taken into account during the pipeline design stage. A conventional structure designed to protect against thrust forces is a concrete block cast to cover the irregular pipe, known as a thrust block. Summary of the Invention [Problem to be solved by the invention]

[0004] When constructing thrust blocks, it is common to design them with an appropriate capacity, taking into account factors such as the thrust force acting on the special-shaped pipe and the expected frictional resistance at the bottom of the block. However, on farms, for example, pipelines laid as part of prefectural or group-run land improvement projects have become the responsibility of individual farmers to maintain and manage the pipelines, as the land improvement districts that reimbursed the project costs have already been dissolved. Individual farmers often find it difficult to commission construction work from specialist contractors or to carry out large-scale repair work, and it is also difficult for farmers themselves to use their non-specialist knowledge to construct thrust blocks.

[0005] In view of the above problems, one aspect of the present invention aims to enable the construction of thrust blocks with an appropriate capacity without specialized knowledge or rigorous calculations. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one embodiment of the present invention provides a thrust block manufacturing kit that can manufacture multiple types of thrust blocks depending on the combination of panels used as thrust block formwork, and is provided with correspondence data that identifies the types of panels required for the combination to manufacture a specified thrust block in correspondence with the hydrostatic pressure applied to the water distribution pipe of the pipeline in which the specified thrust block is installed.

[0007] According to the above-mentioned configuration, thrust blocks can be constructed with an appropriate capacity without specialized knowledge or rigorous calculations.

[0008] In other words, with the above configuration, if the hydrostatic pressure is known, the appropriate panel can be identified by referring to the contents of the corresponding data, and a formwork for producing a thrust block of an appropriate capacity can be easily created, making it possible to easily produce a thrust block of an appropriate capacity.

[0009] In the thrust block manufacturing kit according to one aspect of the present invention, the correspondence data may be such that the types of panels in the required combination are common within a predetermined numerical range of the hydrostatic pressure.

[0010] This configuration eliminates the need for precise measurement of the hydrostatic pressure in the pipeline, and can be based on the hydrostatic pressure displayed on a water pressure gauge, for example. Even if there is some error in the hydrostatic pressure, this configuration allows the same type of panel to be used, taking this error into account. Therefore, if the approximate hydrostatic pressure is known, an appropriate thrust block can be produced by selecting the appropriate panel and fabricating the formwork.

[0011] The thrust block manufacturing kit according to one aspect of the present invention may further include a plurality of types of panels to be used as thrust block formwork.

[0012] According to the above configuration, the person who wants to make a thrust block does not need to separately obtain the panel, but can make an appropriate thrust block by selecting an appropriate panel from the kit, which is one aspect of the present invention, and making a formwork.

[0013] In one embodiment of the thrust block manufacturing kit of the present invention, the correspondence data may identify the type of panel required in combination by correlating it with the hydrostatic pressure applied to the water distribution pipe as well as the diameter of the specially shaped pipe to be wrapped around the thrust block.

[0014] According to the above configuration, by comparing the diameter of the special-shaped pipe with the contents of the corresponding data, it is possible to determine the appropriate capacity thrust block based on the diameter of the special-shaped pipe simply by measuring the hydrostatic pressure inside the pipeline, and with just simple operations, it is possible to select the appropriate panel and create a thrust block of the appropriate capacity.

[0015] In a thrust block manufacturing kit according to one aspect of the present invention, the panel may include a side surface defining panel for defining the side surface of the thrust block to be manufactured, toward which the tube end of the shaped pipe to be wound by the thrust block faces. In this case, the side surface defining panel may include a partial panel having a hole through which the tube end of the shaped pipe passes, and a main panel into which the partial panel can be fitted. The partial panels may be of different types depending on the diameter of the hole, and each partial panel may have the same length and width. Furthermore, the main panel may be configured to have a fitting portion that allows any of the partial panels to be fitted into it.

[0016] According to the above configuration, an appropriate thrust block can be produced by comparing the diameter of the special-shaped pipe with the contents of the corresponding data, selecting an appropriate panel from the kit, and creating a formwork.

[0017] In the thrust block manufacturing kit according to one aspect of the present invention, the correspondence data may specify the types of panels to be combined as required by the hydrostatic pressure for every 10 m of head of water.

[0018] This configuration eliminates the need for precise measurements of the hydrostatic pressure inside the pipeline, relying instead on the hydrostatic pressure displayed on a water pressure gauge, for example. Even if there is some error in the hydrostatic pressure, this configuration allows for a common panel type for every 10m of head, taking into account the error. Therefore, if the approximate hydrostatic pressure is known, an appropriate thrust block can be produced by selecting the appropriate panel and fabricating the formwork.

[0019] In the thrust block manufacturing kit according to one aspect of the present invention, the panel may be made of resin.

[0020] According to the above-mentioned configuration, the panel has durability compared to, for example, a wooden panel, and therefore can be used repeatedly to manufacture thrust blocks.

[0021] In one aspect of the thrust block manufacturing kit of the present invention, the correspondence data may be different for each type of special-shaped pipe to be wound around the thrust block.

[0022] According to the above configuration, thrust blocks of the appropriate capacity can be manufactured for each type of special pipe to be laid in the pipeline. For example, thrust blocks of the appropriate capacity for a tee pipe and thrust blocks of the appropriate capacity for an elbow pipe may differ. Therefore, it is possible to select the appropriate panel for each type of special pipe to manufacture the formwork, and to manufacture thrust blocks of the appropriate capacity.

[0023] In order to solve the above-mentioned problems, a thrust block manufacturing method according to one aspect of the present invention is a thrust block manufacturing method using the above-mentioned thrust block manufacturing kit, and includes the steps of: identifying the hydrostatic pressure acting on the water distribution pipe of the pipeline in which the thrust block is to be installed; using the identified hydrostatic pressure to identify a combination of panels required to manufacture a predetermined thrust block from the correspondence data; combining the identified panels to manufacture the thrust block form; pouring thrust block material into the manufactured thrust block form and solidifying the thrust block material; and removing the solidified thrust block from the thrust block form.

[0024] According to the above configuration, if the hydrostatic pressure is known, a thrust block of appropriate capacity can be produced by selecting an appropriate panel for the cheese pipes and elbow pipes in the pipeline by referring to the contents of the corresponding data and producing a formwork.

[0025] In a thrust block manufacturing method according to one aspect of the present invention, when pouring thrust block material into the thrust block form, a shaped pipe may be placed at a predetermined position inside the thrust block form, and the thrust block material may be poured after the shaped pipe is placed.

[0026] According to the above configuration, a method called "cast-in-land" is possible, in which a thrust block integrated with a special-shaped pipe is produced separately from the existing pipeline and then connected to the required location on the existing pipeline. This eliminates the need for a concrete curing period, thereby shortening the construction period. [Effects of the Invention]

[0027] According to one aspect of the present invention, thrust blocks of an appropriate capacity can be constructed using simple procedures without requiring specialized knowledge or precise calculations. [Brief explanation of the drawings]

[0028] [Figure 1]FIG. 1 is a schematic diagram showing a location in a pipeline where thrust block installation should be considered, according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of a completed thrust block according to an embodiment of the present invention. [Figure 3] 1 is a flowchart showing the corresponding data to be referenced and the deformed pipes at the thrust block installation location according to an embodiment of the present invention. [Figure 4] FIG. 2 is an exploded view of a forming panel according to an embodiment of the present invention. [Figure 5] 1A and 1B are a side view (upper) and a top view (lower) showing a method of connecting a main panel and a partial panel according to an embodiment of the present invention. [Figure 6] FIG. 2 is a schematic diagram showing a flow from formwork preparation to completion of a thrust block according to an embodiment of the present invention. [Figure 7] 1 is a diagram of a combination panel (left side) required to manufacture a thrust block for an elbow pipe (vertical orientation) and a thrust block for an elbow pipe (vertical orientation) (right side) according to an embodiment of the present invention. FIG. [Figure 8] 1 is a diagram of a combination panel (left side) required to manufacture a thrust block for an elbow pipe (horizontal orientation) and a thrust block for an elbow pipe (horizontal orientation) (right side) according to an embodiment of the present invention. FIG. [Figure 9] 10 is a schematic diagram showing the dimensions of a main body panel and a partial panel when a partial panel with a hole or a partial panel without a hole is used in a side surface defining panel having an interlocking structure according to an embodiment of the present invention. FIG. [Figure 10] FIG. 2 is a schematic diagram showing dimensions of a main panel and a partial panel according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] The following describes in detail the embodiments of the present invention. Note that the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

[0030] [Pipeline Overview] An overview of the pipeline and thrust block according to this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram showing the pipeline according to this embodiment. Figure 2 is a schematic diagram of an example of a thrust block completed using the thrust block manufacturing kit according to this embodiment.

[0031] A thrust block completed using the thrust block manufacturing kit according to this embodiment is installed in a pipeline 10 buried underground to supply service water, which is an example of a fluid, as shown in Fig. 1. The pipeline 10 includes multiple T-shaped piping structures 12 and multiple L-shaped piping structures 14, and lays pipes (tubes) to a predetermined location.

[0032] The T-shaped piping structure 12 includes two water supply pipes 16 for transporting water or the like, one branch pipe 18 for transporting water or the like, and a T-shaped pipe joint 20 (hereinafter also referred to as a Tee pipe) that connects the two water supply pipes 16 and the branch pipe 18. The water supply pipes 16, the branch pipes 18, and the pipe joint 20 are each made of a synthetic resin such as polyvinyl chloride.

[0033] The L-shaped piping structure 14 includes one branch pipe 18, one riser pipe 22 or further branch pipe 18 for conveying irrigation water or the like, and an L-shaped pipe joint 24 (hereinafter also referred to as an elbow pipe) that connects the one branch pipe 18 to the one riser pipe 22 or further branch pipe 18. The riser pipe 22 or further branch pipe 18 and the pipe joint 24 are each made of a synthetic resin such as polyvinyl chloride. Furthermore, a water supply valve 26 that controls the supply of irrigation water or the like to a farm field may be connected to the upper end of each riser pipe 22.

[0034] In the case of a pipeline 10 shown in Fig. 1, for example, for a T-shaped piping structure 12, it is necessary to consider the construction of a thrust block 21 in the form of a wound T-shaped pipe joint 20 as shown in Fig. 2. Similarly, for an L-shaped piping structure 14, it is necessary to consider the construction of a thrust block in the form of a wound L-shaped pipe joint 24.

[0035] Although the pipeline 10 in this embodiment is assumed to be a pipeline for transporting agricultural water used mainly in the agricultural field, this embodiment can also be used for purposes other than transporting agricultural water and for purposes other than the agricultural field, as long as the piping has a diameter similar to that of the pipeline for transporting agricultural water. The similar diameter may be, for example, a diameter of about 50 cm to 150 cm, but may also be a pipeline with a larger diameter (for example, 300 cm or more).

[0036] [Consider whether thrust block construction is necessary] When constructing a thrust block, it is necessary to determine whether construction of the thrust block is necessary in the first place and the status of the tee pipe 20 or elbow pipe 24 (hereinafter collectively referred to as "special shaped pipe") at the location where construction is to be performed. The flow for determining whether construction of a thrust block is necessary will be explained below using Figure 3.

[0037] Specifically, it is checked whether the connection method between the special-shaped pipe in question and the water supply pipe 16, branch pipe 18 or riser pipe 22 (hereinafter collectively referred to as straight pipe) is a TS (Taper Sized) joint or an RR (Rubber Ring) joint.

[0038] Here, a TS joint refers to a joint structure where a special-shaped pipe and a straight pipe are connected by welding them to the special-shaped pipe with adhesive applied to the tapered portion of the straight pipe tip, and will hereinafter also be referred to as a rigid joint. If the joint at the construction site is a rigid joint, it is further examined whether the continuous buried length is sufficient based on the hydrostatic pressure within the pipeline and the nominal diameter of the special-shaped pipe.

[0039] Here, the continuous buried length refers to the total length of the straight pipe extending from the shaped pipe, connected by rigid joints. The longer the continuous buried length of the straight pipe, the greater the friction between the outer surface of the pipe and the surrounding soil, and if the friction is sufficiently great, the construction of thrust blocks is not necessary. Table 1 shows the required continuous buried length for each hydrostatic pressure in the pipeline and shaped pipe. [Table 1] If the straight pipe extending from the joint at the construction location is longer than the continuous buried length referred to in Table 1, construction of a thrust block is not required at that location. If the straight pipe is shorter than the continuous buried length referred to in Table 1, construction of a thrust block selected in the subsequent process is required.

[0040] On the other hand, an RR joint refers to a joint structure where a shaped pipe and a straight pipe are connected by fitting a rubber ring attached to the tip of the straight pipe into a recess inside the shaped pipe, and will hereinafter be referred to as a soft joint. If the joint at the construction site is a soft joint, it will automatically be necessary to install a thrust block, which will be selected in the subsequent process.

[0041] [Thrust block manufacturing kit] One embodiment of the present invention provides a thrust block manufacturing kit that can manufacture multiple types of thrust blocks depending on the combination of panels used as thrust block formwork, and includes correspondence data that identifies the types of panels required to be combined to manufacture a specified thrust block in correspondence with the hydrostatic pressure applied to the water distribution pipe of the pipeline in which the specified thrust block is installed.

[0042] The panels are available in a variety of dimensions, and thrust blocks with appropriate capacities can be produced by combining them. Conventional thrust block capacity design requires a resistance greater than the thrust force calculated using the hydrostatic pressure in the construction pipe. However, according to one embodiment of the present invention, by determining the hydrostatic pressure in the construction pipe within a predetermined range indicated in the correspondence data, the required combination of panel types common to the predetermined range can be selected. Here, the predetermined range indicated in the correspondence data can be, for example, a head of 10 m or less, more than 10 m to a head of 20 m or less, more than 20 m to a head of 30 m or less, more than 30 m to a head of 40 m or less, or more than 40 m to a head of 50 m or less.

[0043] The thrust block fabrication kit according to one embodiment of the present invention may include the panels that may be required depending on the nominal diameter and hydrostatic pressure of the construction pipe. Alternatively, a person who intends to fabricate a thrust block may fabricate the panels themselves using commercially available resin plates or the like, referring to the corresponding data included in the thrust block fabrication kit according to one embodiment of the present invention.

[0044] The type of panel required for the combination can also be determined by the diameter of the special pipe to be wound around the thrust block. The diameter of the special pipe corresponding to the panel is determined, for example, by the nominal diameter 20a of the branch pipe and the nominal diameter 20b of the main pipe shown in Figure 2 in the case of a tee pipe, or by the nominal diameters of both ends in the case of an elbow pipe. The diameter of the special pipe can be 50 cm, 75 cm, 100 cm, 125 cm, 150 cm, etc.

[0045] The panels include a side surface defining panel for defining the side surface toward which the end of the shaped pipe faces, so as to provide a surface where the shaped pipe to be wound by the thrust block connects with the straight pipe. Here, the side surface defining panel includes a partial panel having a hole through which the end of the shaped pipe passes, and a main panel into which the partial panel can be fitted. The partial panels are of different types depending on the diameter of the hole, and each partial panel has the same length and width, and the main panel has a fitting portion into which any of the partial panels can be fitted.

[0046] The panel may be made of any material, but is preferably made of resin in view of durability and ease of repeated use.

[0047] The specifications of the corresponding data may be in a form that allows a person attempting to manufacture a thrust block to view the necessary information at a glance, and may be, for example, a printed paper document, software that can be run on a computer, or an app for a tablet device.

[0048] Tables 2 and 3 are shown here as specific examples of the corresponding data. That is, for a location where it is determined that a thrust block needs to be installed, the type of panel required to manufacture the thrust block is selected from Table 2 if the special-shaped pipe at the installation location is a tee pipe, and from Table 3 if it is an elbow pipe (vertical). Note that in Tables 2 and 3, the component numbers shown in Figures 4 and 7, respectively, are referenced.

[0049] For example, if thrust blocks are required for a tee pipe, and the nominal diameter of the main pipe is 75cm, the nominal diameter of the branch pipe is 50cm, and the hydrostatic pressure inside the pipeline is in the range of more than 10m head but not more than 20m head, the panels to be selected and their dimensions are as follows, using Figure 4: (Panel 1) One side defining panel 30 having a side 30x in the X-axis direction and a side 30z in the Z-axis direction, the length of side 30x being 30 cm and the length of side 30z being 30 cm; (Panel 2) One side defining panel 36 having a structure including a partial panel 32 provided with a hole 32a through which the end of a branch pipe (a pipe along the Y-axis direction) of a cheese tube passes, and a main panel 34 having a side 34x in the X-axis direction and a side 34z in the Z-axis direction, into which the partial panel 32 can be fitted, the length of the side 34x being 30 cm, the length of the side 34z being 30 cm, and the diameter of the hole 32a being 50 cm; (Panels 3 and 4) Two side defining panels 42 each having a structure including a partial panel 38 having a hole 38a through which the end of the main tube (the tube along the X-axis direction) of the cheese tube passes, and a main panel 40 having a side 40y in the Y-axis direction and a side 40z in the Z-axis direction, into which the partial panel can be fitted, with the length of side 40y being 30 cm, the length of side 40z being 30 cm, and the diameter of hole 38a being 75 cm. [Table 2] [Table 3] [Table 4]

[0050] [Method for manufacturing a thrust block for a tee pipe] One embodiment of the present invention provides a method for manufacturing thrust blocks using the aforementioned thrust block manufacturing kit. The method includes the steps of: identifying the hydrostatic pressure acting on the water distribution pipe of a pipeline in which a thrust block is to be installed; and using the identified hydrostatic pressure to identify a combination of panels required to manufacture a predetermined thrust block from the corresponding data. The required combination of panels can be broadly divided into those used to manufacture thrust blocks for tee pipes and those used to manufacture thrust blocks for elbow pipes. Below, a method for manufacturing a thrust block for a tee pipe will be described with reference to Figures 4 to 6.

[0051] To manufacture the thrust block for the cheese tube, a mold is made using specific panels. A total of four panels are required (Figure 4): (Panel 1) One side defining panel 30 having a side 30x in the X-axis direction and a side 30z in the Z-axis direction; (Panel 2) One side defining panel 36 having a structure including a partial panel 32 provided with a hole 32a through which the tube end in the Y-axis direction of the cheese tube passes, and a main panel 34 having a side 34x in the X-axis direction and a side 34z in the Z-axis direction, and into which the partial panel can be fitted; (Panels 3 and 4) Two side defining panels 42 having a structure including a partial panel 38 having a hole 38a through which the tube end of the cheese tube in the X-axis direction passes, and a main panel 40 having a side 40y in the Y-axis direction and a side 40z in the Z-axis direction, and into which the partial panel can be fitted.

[0052] Here, the fitting of the partial panels and the main panel in the side surface defining panel and the connection of the side surface defining panels to each other will be described below with reference to the upper diagram of FIG.

[0053] One fastener 52a and one fastener 52b are attached to the upper and lower ends of both sides 51z in the Z-axis direction of the mating portion 51 of the main panel 50, and both sides 56z in the Z-axis direction of the partial panel 56. Note that the fastener 52a attached to the main panel 50 and the fastener 52b attached to the partial panel 56 do not overlap in the Y-axis direction. The partial panel 56 can be fixed to the mating portion of the main panel 50 by overlapping the holes 52az and 52bz provided in the centers of the fasteners 52a and 52b in the Z-axis direction and passing a rod 54 or a bolt 58 through both holes.

[0054] The mating portion between main panel 50 and partial panel 56 may be configured so that side 56xb in the X-axis direction on the outside of the formwork is narrower than side 56xa in the X-axis direction on the inside of the formwork, as shown in the overhead view of the panels in the lower part of Figure 5. This configuration prevents material from leaking out from the gap between main panel 50 and partial panel 56 when the thrust block material is poured into the formwork, allowing for more stable production of thrust blocks.

[0055] The side surface defining panels may also be connected to each other by fasteners 52c attached to the ends and bottom ends of edges 50z at both ends in the X-axis direction, and by passing rods 54 or bolts 58 through the holes in the fasteners, as in the case of the main panel and partial panel described above. With this structure, connecting four side surface defining panels makes it easy to maintain the shape of the formwork as a rectangular parallelepiped.

[0056] The workflow from the creation of the formwork to the completion of the thrust block is explained below using Figure 6. The workflow explained below assumes a construction method known as "cast-in-land construction."

[0057] First, the form 60 completed as described above is placed on the bottom surface 62. Next, the shaped pipes 64 are placed inside the form 60 at positions that properly fit the through holes 60a provided in the partial panels. The thrust block material is then poured into the form 60 until it completely fills it, the top surface is leveled, and the thrust block material is then allowed to solidify. After solidification, the form 60 and bottom surface 62 are removed from the thrust block material, completing the thrust block 66 integrated with the shaped pipes 64. This is then connected to the required locations on the pipeline, completing the installation of the thrust block.

[0058] The material of the bottom surface 62 is not particularly limited as long as it can be removed after the thrust block material has solidified, and examples thereof include resin and a tray filled with sand. To facilitate removal, a release agent may be applied to the inner surface and bottom surface 62 of the formwork 60, or a release sheet may be attached. The thrust block material is a material that can be solidified after being poured into the formwork and has the mass and rigidity to withstand thrust forces after solidification, and examples thereof include concrete.

[0059] If the "cast-in-land" construction method described above is used, for example, if the thrust block material is concrete, there is no need for a curing period for the concrete at the thrust block construction site, making it possible to complete the construction in a short period of time.

[0060] The work flow for completing the thrust block may be a "cast-in-place" construction method. In this case, the already buried shaped pipe is exposed by removing the surrounding soil, a form and base are fitted to the shaped pipe, the thrust block material is poured in and allowed to harden, and after hardening, the form and base are removed and the area is backfilled.

[0061] [Manufacturing method of thrust block for elbow pipe] A method for manufacturing a thrust block for an elbow pipe according to one embodiment of the present invention will be described below. Note that the manufacturing method of the formwork differs between vertical and horizontal elbow pipes.

[0062] A schematic diagram of the formwork and thrust block for a vertical elbow pipe is shown in Figure 7. To manufacture a thrust block for a vertical elbow pipe, a formwork is made using specific panels. That is, a total of five panels and two beams are required: (Panel 1) One side defining panel 70 having an edge 70x in the X-axis direction and an edge 70z in the Z-axis direction; (Panel 2) One side surface defining panel 76 having a structure including a partial panel 72 provided with a hole 72a through which the Y-axis end of the elbow pipe passes, and a main panel 74 having an X-axis side 74x and a Z-axis side 74z, into which the partial panel can be fitted; (Panels 3 and 4) Two side defining panels 78 having sides 78y in the Y-axis direction and sides 78z in the Z-axis direction; (Panel 5) One partial panel 80 having a hole 80a through which the vertical pipe end of the elbow pipe passes; (Beams 1 and 2) Two beams 82 support the partial panel 80 and connect panel 70 to panel 76.

[0063] Thereafter, a thrust block 83 for a vertical elbow pipe can be fabricated in the same manner as the thrust block for a tee pipe.

[0064] A schematic diagram of the formwork and thrust block for the horizontal elbow is shown in Figure 8. To manufacture the thrust block for the horizontal elbow, the formwork is made using specific panels. A total of four panels are required: (Panel 1) One side defining panel 70 having an edge 70x in the X-axis direction and an edge 70z in the Z-axis direction; (Panel 2) One side surface defining panel 76 having a structure including a partial panel 72 provided with a hole 72a through which the Y-axis end of the elbow pipe passes, and a main panel 74 having an X-axis side 74x and a Z-axis side 74z, into which the partial panel can be fitted; (Panel 3) One side defining panel 78 having a side 78y in the Y-axis direction and a side 78z in the Z-axis direction; (Panel 4) One side defining panel 86 having a structure including a partial panel 72 having a hole 72a through which the pipe end of the elbow pipe in the X-axis direction passes, and a main panel 84 having a side 84y in the Y-axis direction and a side 84z in the Z-axis direction, and into which the partial panel can be fitted.

[0065] Thereafter, the thrust block 87 for the horizontal elbow pipe can be fabricated in the same manner as the thrust block for the tee pipe.

[0066] In addition, when the thrust block manufacturing kit according to one embodiment of the present invention includes the above-mentioned panel, for the panel in the portion where the pipe end of the deformed pipe does not face, a side surface defining panel having a fitting structure between the main panel and the partial panel, or a side surface defining panel without a fitting structure may be used. When a side surface defining panel with a fitting structure is used, the presence or absence of a through hole in the partial panel and the relationship between the dimensions of the main panel and the partial panel will be explained below using Figures 9 and 10.

[0067] When a side regulating panel having a fitting structure is used in the portion of the side regulating panel that does not face the pipe end of the irregular pipe, a partial panel 90 without a through hole is used as the side regulating panel in the portion that does not face the pipe end of the irregular pipe. In the thrust block manufacturing kit, the partial panel 92 with a through hole 92a and the partial panel 90 without a through hole 92a preferably have the same length and width. Regarding the length and width, the Y-axis side length 92b may be such that the sum of the Y-axis side length 94a below the fitting portion of the main panel 94 and the Y-axis side length 92b of the partial panel 92 with a through hole 92a and the partial panel 90 without a through hole 92a is equal to or greater than the Y-axis side length 94b of the main panel 94. Naturally, the length and width must be such that the panel 92 with a through hole 92a can be fitted into the main panel 94 to position the hole 92a in the appropriate position.

[0068] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Industrial Applicability]

[0069] The present invention can be used in the agricultural field and the like. [Explanation of symbols]

[0070] 10: Water pipeline, 12: T-shaped piping structure, 14: L-shaped piping structure, 16: Water supply pipe, 18: Branch pipe, 20: T-shaped pipe joint (tee pipe), 20a: Branch pipe nominal diameter (tee pipe), 20b: Main pipe nominal diameter (tee pipe), 21: Thrust block (tee pipe), 22: Rising pipe, 24: L-shaped pipe joint (elbow pipe), 26: Water faucet, 30: Side defining panel, 30x: Side in the X-axis direction, 30z: Side in the Z-axis direction, 32: Partial panel, 32a: Hole through which the pipe end of the tee pipe in the Y-axis direction passes, 34: Main panel, 34x: Side in the X-axis direction, 34z: Side in the Z-axis direction, 36: side defining panel, 38: partial panel, 38a: hole through which the tube end in the X-axis direction of the tee tube passes, 40: main panel, 40y: side in the Y-axis direction, 40z: side in the Z-axis direction, 42: side defining panel, 50: main panel, 50z: sides at both ends of the panel, 51: main panel mating portion, 51z: side in the Z-axis direction of the main panel mating portion, 52a: fastener (main panel mating portion side), 52b: fastener (partial panel side), 52az: fastener hole (main panel side), 52bz: fastener hole (partial panel side), 52c: fastener (main panel both ends of the elbow pipe), 54: rod, 56: partial panel, 56xa: side of the partial panel in the X-axis direction inside the formwork, 56xb: side of the partial panel in the X-axis direction outside the formwork, 56z: side of the partial panel in the Z-axis direction, 58: bolt, 60: formwork, 60a: through hole, 62: bottom surface, 64: profiled pipe, 66: thrust block, 70: side defining panel, 70x: side in the X-axis direction, 70z: side in the Z-axis direction, 72: partial panel, 72a: hole through which the horizontal pipe end of the elbow pipe passes, 74: main panel, 74x: side in the X-axis direction, 74z: side in the Z-axis direction, 76: side defining panel, 78: side defining panel panel, 78y: side in the Y-axis direction, 78z: side in the Z-axis direction, 80: partial panel, 80a: hole 80a through which the vertical pipe end of the elbow pipe passes, 82: beam, 83: thrust block, 84: main panel, 84y: side in the Y-axis direction, 84z: side in the Z-axis direction, 86: side defining panel, 87: thrust block, 90: partial panel (without hole), 92: partial panel (with hole), 92a: through hole, 92b: length of side of partial panel in the thickness direction of the block, 94: main panel, 94a: length of fitting part of the main panel, 94b: length of side of main panel in the thickness direction of the block

Claims

1. A thrust block manufacturing kit that can manufacture multiple types of thrust blocks depending on the combination of panels used as thrust block formwork, the type of the panels required for the combination to manufacture a predetermined thrust block includes correspondence data that is specified in association with the hydrostatic pressure applied to the water pipe of the pipeline in which the predetermined thrust block is installed; The panel includes a side surface defining panel for defining a side surface of the thrust block to be manufactured, the side surface facing the tube end of the profiled tube to be wound by the thrust block; The side surface defining panel is a partial panel having a hole through which the end of the specially shaped pipe passes; a main body panel into which the partial panel can be fitted; Including, The partial panels have different types depending on the diameter of the hole, Each of the partial panels has equal length and width, The main body panel has a fitting portion that can be fitted with any of the partial panels. Thrust block construction kit.

2. The correspondence data indicates that the types of panels in the required combination are common within a predetermined range of hydrostatic pressure. The thrust block construction kit of claim 1 .

3. Further including multiple types of panels for use as thrust block formwork; 3. The thrust block manufacturing kit according to claim 1 or 2.

4. The correspondence data specifies the type of panel required for the combination in correspondence with the diameter of the special-shaped pipe to be wound around the thrust block in addition to the hydrostatic pressure applied to the water distribution pipe. The thrust block manufacturing kit according to any one of claims 1 to 3.

5. The correspondence data specifies the types of panels in the required combination by the hydrostatic pressure for every 10 m of water head. The thrust block manufacturing kit according to any one of claims 1 to 4.

6. The panel is made of resin.

6. The thrust block manufacturing kit according to claim 1.

7. The correspondence data differs depending on the type of special-shaped pipe to be wound around the thrust block.

7. The thrust block manufacturing kit according to claim 1.

8. A thrust block manufacturing method using the thrust block manufacturing kit according to any one of claims 1 to 7, comprising: Identifying the hydrostatic pressure acting on the water pipe of the pipeline where the thrust block is to be installed; using the determined hydrostatic pressure to identify a combination of panels required to fabricate a predetermined thrust block from the corresponding data; Assembling the identified panels to form the thrust block form; pouring a thrust block material into the prepared thrust block form and allowing the thrust block material to solidify; removing the solidified thrust block from the thrust block form; Including, When pouring the thrust block material into the thrust block form, a shaped pipe is placed at a predetermined position inside the thrust block form, and the thrust block material is poured after the shaped pipe is placed. Thrust block manufacturing method.

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