CN117172023B - Water supply pipeline restoration structure design method and device - Google Patents
Water supply pipeline restoration structure design method and device Download PDFInfo
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- CN117172023B CN117172023B CN202311224514.0A CN202311224514A CN117172023B CN 117172023 B CN117172023 B CN 117172023B CN 202311224514 A CN202311224514 A CN 202311224514A CN 117172023 B CN117172023 B CN 117172023B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008439 repair process Effects 0.000 claims abstract description 29
- 239000003673 groundwater Substances 0.000 claims description 9
- 230000007774 longterm Effects 0.000 claims description 6
- 230000006855 networking Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 49
- 239000000463 material Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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Abstract
The invention relates to a water supply pipeline restoration structure design method, which belongs to the technical field of water supply and drainage engineering and is characterized in that: the method comprises the following steps: determining a section to be repaired of the pipeline, and calculating to obtain the length, the width and the depth of the working wells at the two ends; determining full-structure repair or half-structure repair according to whether the ratio of the damaged area of the pipeline section to be repaired to the total area of the pipeline section to be repaired is greater than 20%; carrying out full-structure repair on a section to be repaired of the pipeline, taking a liner tube in the structural layer as a brand new pipeline design, and calculating the thickness of the liner tube in the structural layer according to all loads inside and outside the pipeline; performing semi-structural repair on the pipeline section to be repaired; and calculating the pulling force when the liner tube in the structural layer is pulled into the pipeline to-be-repaired section and the length of the two ends of the liner tube in the structural layer extending out of the pipeline to-be-repaired section. The method can quickly determine the repair structure of the water supply pipeline and accurately obtain the proper size of the working well, the thickness, the pulling force and the extension length of the liner tube in the structure layer. So as to accelerate the repair speed of the water supply pipeline.
Description
Technical Field
The invention belongs to the technical field of water supply and drainage engineering, and particularly relates to a water supply pipeline restoration structure design method and a water supply pipeline restoration structure design device.
Background
With the continuous progress of society, urban water supply networks are increasingly perfect, people can use tap water at home, but problems that water supply pipelines of cities, particularly pipelines of old urban areas, are mostly built in the last 70-80 th century, developed cities are built even earlier, and because cast iron or plain concrete is mainly selected as materials at the moment, the life of the materials gradually reaches the design age after the materials are used for a period of 20-30 years, so that leakage is caused to the pipelines at times, resident water consumption is affected, and therefore, the old urban water supply networks often need to be repaired.
In order to avoid large-scale excavation, the current water supply pipeline repairing method is to excavate a working well at the front end and the rear end of a pipe section to be repaired respectively and cut off the pipeline after the pipe section to be repaired is determined, a hose is put into the pipe section to be repaired to serve as a liner tube in a structural layer, and the liner tube in the structural layer is solidified to form a tightly bonded structural layer and a protective layer. The structural layer is used for bearing partial or all internal and external pressure, the protective layer is used for being contacted with water and is full-structure repair, but due to different damage conditions of pipelines, in practice, half-structure repair bearing internal water pressure or full-structure repair bearing internal and external pressure is selected, and the specific parameters of an open work channel and the like are determined by constructors through experience, so that the technical requirements on constructors are higher, otherwise, the repair effect of a water supply pipeline is not as expected and for no reason increases the cost due to incorrect selection.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a water supply pipeline restoration structure design method and device so as to meet the requirement of quickly and accurately determining various parameters during restoration of a water supply pipeline.
The technical proposal is as follows:
a water supply pipeline repairing structure design method comprises the following steps:
step 1: determining a pipeline to-be-repaired section, and calculating to obtain the sizes of the working wells at two ends according to the data of the pipeline to-be-repaired section, wherein the sizes comprise length, width and depth, and the lengths of the working wells are as follows:
Lp＝L1+2L2
Wherein L p is the length of the working well, and the unit is m; l 1 is the net working length in the working well, and the unit is m; l 2 is the length of the original pipeline extending into the working well from one side, and the unit is m;
the width of the working well is as follows:
Wp＝D+2a
Wherein W p is the width of the working well, and the unit is m; d is the outer diameter of the original pipeline, and the unit is m; a is the distance between the edge of the single-side pipeline and the edge of the working well, and the unit is m;
The working well depth is:
Hp＝h1+D+h2
Wherein H p is the depth of the working well, and the unit is m; h 1 is the thickness of the pipe top covering soil, and the unit is m; h 2 is the distance from the bottom of the pipe to the bottom of the working well, and the unit is m;
step 2: determining a breakage rate according to the ratio of the breakage area of the pipeline to be repaired to the total area of the pipeline to be repaired, entering the step 3 when the breakage rate is more than 20%, and entering the step 4 when the breakage rate is less than or equal to 20%;
Step 3: carrying out full-structure repair on a section to be repaired of the pipeline, taking a liner tube in the structural layer as a brand new pipeline design, calculating the thickness of the liner tube in the structural layer according to all loads inside and outside the pipeline, and entering a step 5;
step 4: and (3) performing semi-structural repair on the pipeline section to be repaired and entering a step (5), wherein the thickness of the liner tube in the structural layer is as follows:
wherein t is the thickness of the liner tube in the structural layer, and the unit is mm; d o is the outer diameter of the liner tube in the structural layer, and the unit is mm; k is the supporting coefficient of the original pipeline to the lining pipe; e L is the long-term elastic modulus of the liner in the structural layer; c is the ovality reduction coefficient of the original pipeline; n is the circumferential stability resistance coefficient of the section of the pipeline; μ is poisson's ratio of the liner in the structural layer; p v is vacuum pressure in MPa; p w is the pressure of groundwater at the top of the pipe; step 5: calculating the tensile force when the liner tube in the structural layer is pulled into the pipeline to-be-repaired section and the length of the liner tube in the structural layer, which extends out of the pipeline to-be-repaired section, wherein the tensile force is as follows:
Wherein F is the maximum allowable pulling force of the liner tube in the structural layer, and the unit is N; σ t is the tensile strength at yield of the liner tube in the structural layer in MPa; n 1 is a safety coefficient;
The length L of the section to be repaired of the pipeline extending from the two ends of the liner tube in the structural layer is not less than 500, and is not less than 500 when the diameter D of the liner tube in the structural layer is not less than 500, not less than 800 when the diameter D is not less than 500, not less than 800, and not less than 1000 when the diameter D is not less than 800.
Further, in the step 1, the length L 2 of the original pipeline extending into the working well from one side is 0.5m, the net working length L 1 in the working well is 3m when the outer diameter of the original pipeline is less than 0.8m, and is 4m when the outer diameter of the original pipeline is more than or equal to 0.8 m; the distance a between the edge of the side pipeline and the edge of the working well is 0.5m when D is less than 0.8m, and 0.75m when D is more than or equal to 0.8 m; the distance h 2 between the bottom of the pipe and the bottom of the working well is 0.5m.
Further, in step 4, the groundwater pressure P w at the top position of the pipe is:
Pw＝0.00981Hw
Wherein H w is the depth of the groundwater level above the pipe top, and the unit is m;
the ovality reduction coefficient C of the original pipeline is as follows:
Wherein q is ovality of the original pipeline, and is:
or (b)
Wherein D E is the average inner diameter of the original pipeline, and the unit is mm; d min is the minimum inner diameter of the original pipeline, and the unit is mm; d max is the maximum inner diameter of the original pipeline, and the unit is mm.
Further, in the step 4, the supporting coefficient K of the original pipeline to the lining pipe is 7.0; the long-term elastic modulus E L of the liner in the structural layer is 50% of the initial elastic modulus of the liner in the structural layer; the Poisson's ratio mu of the liner tube in the structural layer is 0.3, and the vacuum pressure P v is 0.05Mpa; the circumferential stability resistance coefficient N of the section of the pipeline is an integer greater than 2.
Further, in step 5, the safety factor N 1 is 3.0.
A water supply pipeline repairing structure design device comprises an execution unit, a storage unit, an input unit and a display unit; the input unit, the storage unit and the display unit are all electrically connected with the execution unit, the storage unit stores the steps of the water supply pipeline restoration structure design method, various coefficients and corresponding data input by the input unit, the execution unit matches the corresponding data input by the input unit with the steps of the water supply pipeline restoration structure design method stored in the storage unit and sequentially executes the corresponding data, and the input unit is used for inputting the steps of the water supply pipeline restoration structure design method: the display unit is used for displaying the result.
Furthermore, the execution unit is a CPU or a singlechip.
Further, the memory unit is at least one volatile memory (RAM) and/or at least one nonvolatile memory (ROM), and when the volatile memory is present in the memory unit, a replaceable or rechargeable battery such as a zinc-manganese battery, a nickel-metal hydride battery, or a lithium battery is connected.
Further, the input unit is a keypad with numbers or a plurality of independent buttons.
Further, the display unit is an LED display screen, an LCD display screen, a TFT display screen, an STN display screen or a CRT display screen.
The beneficial effects are that:
1) The method can quickly determine whether the water supply pipeline is repaired by a full structure or a half structure, and accurately obtain the proper working well size, the thickness of the liner tube in the structural layer, the pulling force and the extension length. So as to accelerate the repair speed of the water supply pipeline.
2) The device further simplifies the on-site calculation difficulty, can obtain a result by directly inputting corresponding parameters, and greatly reduces the cultural and technical level requirements of constructors.
Drawings
FIG. 1 is a schematic flow chart of a water supply pipeline restoration structure design method of the present invention;
FIG. 2 is a schematic view of a water supply pipe repair structure design device;
wherein: 1 is an execution unit, 21 is a nonvolatile memory, 22 is a volatile memory, 3 is an input unit, 4 is a display unit, and 5 is a battery.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention, and that the terms "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and are not to be construed as limiting the invention:
The design method of the repair structure of the water supply pipeline shown in fig. 1 comprises the following steps:
step 1: determining a pipeline to-be-repaired section, and calculating to obtain the sizes of the working wells at two ends according to the data of the pipeline to-be-repaired section, wherein the sizes comprise length, width and depth, and the lengths of the working wells are as follows:
Lp＝L1+2L2
Wherein L p is the length of the working well, and the unit is m; l 1 is the net working length in the working well, and the unit is m; l 2 is the length of the original pipeline extending into the working well from one side, and the unit is m;
the width of the working well is as follows:
Wp＝D+2a
Wherein W p is the width of the working well, and the unit is m; d is the outer diameter of the original pipeline, and the unit is m; a is the distance between the edge of the single-side pipeline and the edge of the working well, and the unit is m;
The working well depth is:
Hp＝h1+D+h2
Wherein H p is the depth of the working well, and the unit is m; h 1 is the thickness of the pipe top covering soil, and the unit is m; h 2 is the distance from the bottom of the pipe to the bottom of the working well, and the unit is m;
step 2: determining a breakage rate according to the ratio of the breakage area of the pipeline to be repaired to the total area of the pipeline to be repaired, entering the step 3 when the breakage rate is more than 20%, and entering the step 4 when the breakage rate is less than or equal to 20%;
Step 3: carrying out full-structure repair on a section to be repaired of the pipeline, taking a liner tube in the structural layer as a brand new pipeline design, calculating the thickness of the liner tube in the structural layer according to all loads inside and outside the pipeline, and entering a step 5;
step 4: and (3) performing semi-structural repair on the pipeline section to be repaired and entering a step (5), wherein the thickness of the liner tube in the structural layer is as follows:
Wherein t is the thickness of the liner tube in the structural layer, and the unit is mm; d o is the outer diameter of the liner tube in the structural layer, and the unit is mm; k is the supporting coefficient of the original pipeline to the lining pipe; e L is the long-term elastic modulus of the liner in the structural layer; c is the ovality reduction coefficient of the original pipeline; n is the circumferential stability resistance coefficient of the section of the pipeline; μ is poisson's ratio of the liner in the structural layer; p v is vacuum pressure in MPa; p w is the pressure of groundwater at the top of the pipe;
Step 5: calculating the tensile force when the liner tube in the structural layer is pulled into the pipeline to-be-repaired section and the length of the liner tube in the structural layer, which extends out of the pipeline to-be-repaired section, wherein the tensile force is as follows:
Wherein F is the maximum allowable pulling force of the liner tube in the structural layer, and the unit is N; σ t is the tensile strength at yield of the liner tube in the structural layer in MPa; n 1 is a safety coefficient;
The length L of the section to be repaired of the pipeline extending from the two ends of the liner tube in the structural layer is not less than 500, and is not less than 500 when the diameter D of the liner tube in the structural layer is not less than 500, not less than 800 when the diameter D is not less than 500, not less than 800, and not less than 1000 when the diameter D is not less than 800.
In the step 1, the length L 2 of the original pipeline extending into the working well from one side is 0.5m, the net working length L 1 in the working well is 3m when the outer diameter of the original pipeline is less than 0.8m, and is 4m when the outer diameter of the original pipeline is more than or equal to 0.8 m; the distance a between the edge of the side pipeline and the edge of the working well is 0.5m when D is less than 0.8m, and 0.75m when D is more than or equal to 0.8 m; the distance h 2 between the bottom of the pipe and the bottom of the working well is 0.5m.
In the step 4, the groundwater pressure P w at the pipe top is:
Pw＝0.00981Hw
Wherein H w is the depth of the groundwater level above the pipe top, and the unit is m;
the ovality reduction coefficient C of the original pipeline is as follows:
Wherein q is ovality of the original pipeline, and is:
or (b)
Wherein D E is the average inner diameter of the original pipeline, and the unit is mm; d min is the minimum inner diameter of the original pipeline, and the unit is mm; d max is the maximum inner diameter of the original pipeline, and the unit is mm.
Step 4, the supporting coefficient K of the original pipeline to the lining pipe is 7.0; the long-term elastic modulus E L of the liner in the structural layer is 50% of the initial elastic modulus of the liner in the structural layer; the Poisson's ratio mu of the liner tube in the structural layer is 0.3, and the vacuum pressure P v is 0.05Mpa; the circumferential stability resistance coefficient N of the section of the pipeline is an integer greater than 2.
In the step 5, the safety factor N 1 is 3.0.
A water supply pipeline repairing structure design device comprises an execution unit, a storage unit, an input unit and a display unit; the input unit, the storage unit and the display unit are all electrically connected with the execution unit, the storage unit stores the steps of the water supply pipeline restoration structure design method, various coefficients and corresponding data input by the input unit, the execution unit matches the corresponding data input by the input unit with the steps of the water supply pipeline restoration structure design method stored in the storage unit and sequentially executes the corresponding data, and the input unit is used for inputting the steps of the water supply pipeline restoration structure design method: the display unit is used for displaying the result.
The execution unit is a CPU or a singlechip.
The memory unit is at least one volatile memory and/or at least one nonvolatile memory, and when the volatile memory is present in the memory unit, a replaceable or rechargeable battery is connected.
The input unit is a keypad with numbers or a plurality of independent buttons.
The display unit is an LED display screen, an LCD display screen, a TFT display screen, an STN display screen and a CRT display screen.
Example 1: in a water supply pipeline restoration site, a construction responsible person determines a pipeline to be restored section, and working wells at two ends are obtained through calculation by the company; determining whether to adopt full-structure repair or half-structure repair according to whether the ratio of the damaged area of the pipeline section to be repaired to the total area of the pipeline section to be repaired is greater than 20%; calculating the thickness of the liner tube in the structural layer by using different formulas respectively, and selecting a proper liner tube in the structural layer; and finally, calculating the pulling force when the liner tube in the structural layer is pulled into the pipeline to be repaired and the length of the two ends of the liner tube in the structural layer extending out of the pipeline to be repaired, setting the liner tube in the structural layer in place, and finally solidifying the liner tube by corresponding equipment to finish the repair of the water supply pipeline.
Example 2: in the water supply pipeline restoration site, the water supply pipeline restoration structure design device can also be directly used, the damaged area of a pipeline to be restored, the whole area of the pipeline to be restored, the outer diameter of a liner tube in a structural layer, vacuum pressure, underground water pressure at the position of a tube top, the outer diameter of an original pipeline, the average inner diameter of the original pipeline (which is also equal to the outer diameter of the liner tube in the structural layer), the minimum inner diameter of the original pipeline, the maximum inner diameter of the original pipeline, the depth of the underground water level above the tube top, the initial elastic modulus of the carried liner tube in the structural layer, poisson's ratio and other related data can be input through a keyboard, the length, width and depth of working well excavation can be obtained on a display screen, the thickness of the liner tube in the structural layer, the pulling force of the liner tube in the structural layer when the liner tube is pulled into the pipeline to be restored, and the length of the liner tube extending out of the pipeline to be restored in the structural layer can be set in place through the data, and finally the liner tube in the structural layer is solidified by corresponding equipment, and the restoration of the water supply pipeline is completed.
Example 3: the water supply pipeline restoration structure design device can also be APP software, a construction responsible person only needs to open a mobile phone on the water supply pipeline restoration site, relevant data is filled in the installed APP software, and the rest parts are the same as those in the embodiment 2.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (9)
1. The water supply pipeline repairing structure design method is characterized by comprising the following steps of:
step 1: determining a pipeline to-be-repaired section, and calculating to obtain the sizes of the working wells at two ends according to the data of the pipeline to-be-repaired section, wherein the sizes comprise length, width and depth, and the lengths of the working wells are as follows:
Lp＝L1+2L2
Wherein L p is the length of the working well, and the unit is m; l 1 is the net working length in the working well, and the unit is m; l 2 is the length of the original pipeline extending into the working well from one side, and the unit is m;
the width of the working well is as follows:
Wp＝D+2a
Wherein W p is the width of the working well, and the unit is m; d is the outer diameter of the original pipeline, and the unit is m; a is the distance between the edge of the single-side pipeline and the edge of the working well, and the unit is m;
The working well depth is:
Hp＝h1+D+h2
Wherein H p is the depth of the working well, and the unit is m; h 1 is the thickness of the pipe top covering soil, and the unit is m; h 2 is the distance from the bottom of the pipe to the bottom of the working well, and the unit is m;
step 2: determining a breakage rate according to the ratio of the breakage area of the pipeline to be repaired to the total area of the pipeline to be repaired, entering the step 3 when the breakage rate is more than 20%, and entering the step 4 when the breakage rate is less than or equal to 20%;
Step 3: carrying out full-structure repair on a section to be repaired of the pipeline, taking a liner tube in the structural layer as a brand new pipeline design, calculating the thickness of the liner tube in the structural layer according to all loads inside and outside the pipeline, and entering a step 5;
step 4: and (3) performing semi-structural repair on the pipeline section to be repaired and entering a step (5), wherein the thickness of the liner tube in the structural layer is as follows:
Wherein t is the thickness of the liner tube in the structural layer, and the unit is mm; d o is the outer diameter of the liner tube in the structural layer, and the unit is mm; k is the supporting coefficient of the original pipeline to the lining pipe; e L is the long-term elastic modulus of the liner in the structural layer; c is the ovality reduction coefficient of the original pipeline; n is the circumferential stability resistance coefficient of the section of the pipeline; μ is poisson's ratio of the liner in the structural layer; p v is vacuum pressure in MPa; p w is the top position groundwater pressure, and top position groundwater pressure P w is:
Pw＝0.00981Hw
wherein H w is the depth of the groundwater level above the pipe top, and the unit is m; the ovality reduction coefficient C of the original pipeline is as follows:
Wherein q is ovality of the original pipeline, and is:
or (b)
Wherein D E is the average inner diameter of the original pipeline, and the unit is mm; d min is the minimum inner diameter of the original pipeline, and the unit is mm; d max is the maximum inner diameter of the original pipeline, and the unit is mm;
Step 5: calculating the tensile force when the liner tube in the structural layer is pulled into the pipeline to-be-repaired section and the length of the liner tube in the structural layer, which extends out of the pipeline to-be-repaired section, wherein the tensile force is as follows:
Wherein F is the maximum allowable pulling force of the liner tube in the structural layer, and the unit is N; σ t is the tensile strength at yield of the liner tube in the structural layer in MPa; n 1 is a safety coefficient;
the length L of the section to be repaired of the pipeline extending from the two ends of the liner tube in the structural layer is equal to or more than 500 when the diameter D of the liner tube in the structural layer is equal to or less than 500, is equal to or more than 800 when the diameter D of the liner tube in the structural layer is equal to or less than 800, is equal to or more than 1000 when the diameter D of the liner tube in the structural layer is equal to or more than 800, and the unit is mm.
2. The water supply pipe repair structure design method according to claim 1, wherein: the length L 2 of the original pipeline extending into the working well from one side in the step 1 is 0.5m, the net working length L 1 in the working well is 3m when the outer diameter of the original pipeline is less than 0.8m, and is 4m when the outer diameter of the original pipeline is more than or equal to 0.8 m; the distance a between the edge of the side pipeline and the edge of the working well is 0.5m when D is less than 0.8m, and 0.75m when D is more than or equal to 0.8 m; the distance h 2 between the bottom of the pipe and the bottom of the working well is 0.5m.
3. The water supply pipe repair structure design method according to claim 1, wherein: the supporting coefficient K of the original pipeline to the lining pipe in the step 4 is 7.0; the long-term elastic modulus E L of the liner in the structural layer is 50% of the initial elastic modulus of the liner in the structural layer; the Poisson's ratio mu of the liner tube in the structural layer is 0.3, and the vacuum pressure P v is 0.05Mpa; the circumferential stability resistance coefficient N of the section of the pipeline is an integer greater than 2.
4. The water supply pipe repair structure design method according to claim 1, wherein: in the step 5, the safety factor N 1 is 3.0.
5. The utility model provides a water supply pipeline restoration structure design device which characterized in that: comprises an execution unit (1), a storage unit, an input unit (3) and a display unit (4); the input unit, the storage unit and the display unit are all electrically connected with the execution unit, the storage unit stores the steps of the water supply pipeline restoration structure design method, various coefficients and corresponding data input by the input unit, the execution unit matches the corresponding data input by the input unit with the steps for inputting the water supply pipeline restoration structure design method according to any one of claims 1 to 4 stored in the storage unit and sequentially executes the steps, the input unit is used for inputting data required in the steps of the water supply pipeline restoration structure design method, and the display unit is used for displaying results.
6. A water supply pipe repair structure design device, as set forth in claim 5, wherein: the execution unit is a CPU or a singlechip.
7. A water supply pipe repair structure design device, as set forth in claim 5, wherein: the memory unit is at least one volatile memory (22) and/or at least one nonvolatile memory (21), and when the volatile memory is present in the memory unit, a replaceable or rechargeable battery (5) is connected.
8. A water supply pipe repair structure design device, as set forth in claim 5, wherein: the input unit is a keyboard with numbers or a plurality of independent buttons.
9. A water supply pipe repair structure design device, as set forth in claim 5, wherein: the display unit is any one of an LED display screen, an LCD display screen, a TFT display screen, an STN display screen and a CRT display screen.
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