JP4309023B2 - Main line search system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a main line search system, and more particularly, to a system for extracting, as a main line, a route for supplying the most water from a water source to a water supply point arbitrarily set in a pipe network.
[0002]
[Prior art]
Conventionally, there is no dedicated system for extracting a route for supplying the most water from a water source to a water supply point arbitrarily designated in a pipe network. As a similar technique, there is a technique for obtaining the flow direction and flow rate of water at an arbitrary intersection specified in a pipe network by a hydraulic analysis technique (for example, JP-A-6-274576). It is also possible to obtain the main line by manually determining the amount of water in each of a plurality of routes from the water source to the water supply point and artificially selecting a route having the largest flow rate from the plurality of routes.
[0003]
[Problems to be solved by the invention]
Considering earthquake damage, large-scale earthquakes cause great damage to water pipes, and it takes a long time to restore the water pipes. For this reason, it is highly necessary to secure water supply to specific water supply points such as hospitals and evacuation centers for disaster victims even after the occurrence of an earthquake. There is a need for a system that can extract the main line that supplies power before the earthquake occurs and output it as data when performing seismic retrofitting work. However, in the conventional technique described above, each of a plurality of paths between the water source and the water supply point is artificially selected, and the flow rate in each path is obtained by hydraulic analysis. Since the main line is obtained by artificially selecting, it takes time and there is room for improvement.
[0004]
An object of the present invention is to rationally configure a system that can quickly extract a main line even in a large-scale pipe network.
[0005]
[Means for Solving the Problems]
A first feature of the present invention (Claim 1) is that a water supply point is arbitrarily designated for a pipe network to which water from a water source is supplied, so that a plurality of paths between the water supply point and the water source can be obtained. The main line search means for obtaining the main line consisting of the path of the maximum flow rate and a processing device for outputting the main line thus obtained to the output device, and the main line search means are closest to the water supply point The route that supplies the most water to the intersection of the positions is extracted, and the processing according to the rule for extracting the route that supplies the most water to the intersection on the upstream side of the extracted route reaches the water source. The operation and the effect are as follows. It is configured to perform the process of setting the plurality of routes extracted as described above to the main line.
[0006]
A second feature of the present invention (Claim 2) is that, in Claim 1, the main line searching means obtains the water flow direction and flow rate of a plurality of pipe lines connected to the intersection by hydraulic analysis, and the flow direction is The processing mode is set so as to extract the one having the maximum flow rate from the water feeding side, and its operation and effect are as follows.
[0007]
According to a third feature of the present invention (Claim 3), in Claim 1 or 2, the output device is configured by a display for displaying a pipe network, and a water supply point is set by pointing means for the display. After this setting, after the main line is extracted by the main line searching means, the processing mode of the processing device is set so that the route from the water source to the water supply point is displayed on the display. The operation and effect are as follows.
[0008]
According to a fourth feature of the present invention (Claim 4), in any one of Claims 1 to 3, the pipe network is configured to combine and use a plurality of pipe laying information stored in the storage means. The operation and effect are as follows.
[0009]
[Action]
[0010]
According to the first feature, an intersection point closest to the water supply point is obtained on the basis of a water supply point arbitrarily designated for the pipe network, and a route for supplying the most water to the intersection point is obtained. In addition, since the processing according to the rule for extracting the route that supplies the most water to the intersection on the upstream side of the extracted route is repeated in the direction going back to the water source, Compared with the one that obtains the flow rate of each of a number of paths as in the above technique and performs the process of artificially extracting the maximum of the multiple flow rates, it is automatically performed only by repeating simple processing. The trunk line can be obtained, and the processing apparatus outputs the main trunk line extracted in this way to the output device, so that the operator can recognize the main line based on the output result.
[0011]
According to the second feature, the main line searching means obtains the flow direction and flow rate of a plurality of pipelines connected to the intersection by hydraulic analysis, and extracts the flow rate having the maximum flow rate from the side that feeds water. Since the processing mode is set, simple processing is sufficient.
[0012]
According to the third feature, the extracted main line is displayed on the display by executing the main line search means after setting the water supply point with the pointing means in the pipe network displayed on the display. The extraction result can be visually recognized.
[0013]
According to the fourth feature, since the plurality of pipe laying information stored in the storage means are combined and used, it is possible to save the trouble of inputting information on the entire pipe network, which tends to increase the amount of information. It is also possible to extract the main line based on the information on the position of the pipeline and the amount of water attached to the pipeline.
[0014]
〔The invention's effect〕
Therefore, a system that can automatically extract and recognize a main trunk line simply by specifying a water supply point even in a large-scale pipe network has been rationally configured. In addition, even if the pipe network is complex, the main line can be obtained simply by repeating the processing that allows simple and quick extraction, and the main line can be obtained only by visual processing based on the display on the display. The main line can be extracted using existing data without forming a special pipe network.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, there is a display 1 composed of a CRT or liquid crystal display device as an output device, and a general-purpose computer 3 as a processing device having a built-in hard disk 2 as storage means. Damage assessment system is configured. As shown in the figure, the general-purpose computer 3 is provided with a data input keyboard 4 and a mouse 5 as pointing means, and the general-purpose computer 3 is connected to a printer 6 as an output device.
[0016]
This system compares the damage caused by an earthquake in an existing pipe network PN supplied with water from a water source S as shown in FIG. 2 with the damage estimated for an earthquake in a pipe network assuming earthquake resistance. A program for performing processing to output to the display 1 or the printer 6 is set. As shown in FIG. 3, the outline of the process is shown in FIG. 3 in which the first estimation process (#A) performs an earthquake simulation for the existing pipe network PN, and the damaged pipeline estimated by this simulation is already displayed on the display 1. A process for displaying in the pipe network and a process for displaying the estimated result on the display 1 by estimating a water-stopping population or a water-stopping rate by the damage estimation process (#B) based on the damaged pipe line are performed. In addition, a process for assuming earthquake resistance is performed from the estimated damaged pipelines in accordance with the priority order set in advance in the earthquake resistance assumption process (#C), and further assumed in the earthquake resistance assumption process (#C). The process of displaying the assumed result in the pipe network of the display 1 is performed. Next, in the seismicization cost calculation process (#C ′), the construction cost necessary for laying the pipeline assumed to be seismic resistance in the earthquake resistance assumption process (#C) is calculated, and the second estimation process ( In #D), as described above, an earthquake simulation is performed on a pipe network that is assumed to be earthquake resistant, and the damage pipeline estimated by this simulation is displayed in the pipe network of the display 1, and based on this damage pipeline. In the damage estimation process (#E), a water-stopping population or a water-stopping rate is estimated, and the estimation result is displayed on the display 1. Next, the comparison process (#F) compares the results of the #B and #E estimation processes, and the comparison process (#G) outputs the comparison results to the display 1 and the printer 6. It is to do.
[0017]
In this process, only the information flow used when performing the first estimation process (#A), the damage estimation process (#B), and the earthquake resistance assumption process (#C) is shown in FIG. As shown. That is, the damage rate (Rm) of each pipeline constituting the pipeline PN is obtained by executing an earthquake simulation based on pipeline information constituting the pipeline PN, correction information described later, and predetermined earthquake information. The damage probability (Pf) of the pipe is estimated based on the damage rate (Rm) and the pipe length information of each pipe, and the damage probability (Pf) of each pipe and the random number thus estimated are estimated. Based on this, the damage pipeline is estimated. The above process is the outline of the first estimation process (#A), and the damage estimation process (#B) based on the information on the damaged pipeline and the hydraulic analysis information estimated in this way, that is, The water cut-off rate is calculated, and the seismic anticipation process (#C) is performed based on the information on the damaged pipeline estimated in this way and the information on the weight value (K). These processes are described below.
[0018]
As shown in the flowchart of FIG. 5, the first estimation process (#A) is a state in which the pipeline information constituting the pipeline PN and the correction information are set, and the pipeline damage rate ( Rm) is estimated, the pipe damage probability (Pf) is estimated from this pipe damage rate (Rm), and the damage pipe is estimated based on the pipe damage probability (Pf) and a random number. A process for storing the identification information of the estimated damaged pipeline in the memory or the like is performed (steps # 101 to 105).
[0019]
Specifically, in step # 101, the pipe network PN is partitioned into meshes at predetermined distances as shown in FIG. 6, and the pipeline information is set in each region Z partitioned in meshes, respectively. The correction information is set for the pipeline in the area Z. Here, the structure of the pipeline information file Fa that stores the pipeline information will be described. As shown in FIG. 2, the area where the pipeline PN exists is divided into a plurality of areas Ar corresponding to the respective areas Ar. A pipeline information file Fa is stored in the hard disk 2. The pipe line information file Fa (an example of pipe laying information) stored in the hard disk 2 includes [header] and [information area] as shown in FIG. Save the date, update date, data amount, offset position information indicating the position of the area Ar, etc., [information area] is to store the pipeline information, valve / plug information, and geographic information, As the pipeline information, the position of both ends of the pipeline, bending position, pipe type, pipe diameter, pipe length, laying depth, burial depth, flow rate (water volume), aging, average pressure change, low pressure target population, flow rate ratio, etc. Information, including information on the position and type of valves and plugs as valve / plug information, including information on topography, road position, and building position as geographic information, and as earthquake information It contains information such as seismic intensity, earthquake maximum acceleration, and liquefaction risk. There. In this system, as shown in FIG. 18, the pipe network is displayed in the window W1 of the display 1 in a state where the pipes are connected by a process such as coordinate conversion of the position of the pipe information in each pipe information file Fa. PN is displayed (the processing form is not described in detail), and if necessary, the window W2 is opened separately to display the enlarged pipeline, or the pipeline selected from the pipeline PN Information, that is, information such as pipe diameter, pipe length, laying date, and the like is read from the pipe line information file Fa and displayed at a position near the pipe line.
[0020]
As shown in FIGS. 8 to 11, the correction information includes a “correction coefficient related to pipe type” Cp, a “correction coefficient related to pipe diameter” Cd, a “correction coefficient related to landform / ground” Cg, and a “correction coefficient related to liquefaction”. These correction coefficients are given to the respective pipes when the earthquake is simulated. In addition, the earthquake information is a presumed seismic source out of active faults that affect the area where the pipe network PN exists, and data of a presumed scale (held by local governments, etc.) It is comprised including.
[0021]
Step # 102 performs a process of estimating the pipe damage rate (Rm) for each mesh-shaped area Z based on the earthquake information. The above-mentioned data is used for this earthquake information, and the formula published by Japan Water Works Association is used to estimate the pipe damage rate (Rm). The formula is as follows.
[0022]
Rm (α) = Cp × Cd × Cg × Cl × R (α),
Rm (α): Damage rate when the maximum acceleration of ground motion is α
Cp: correction coefficient for tube type,
Cd: correction coefficient related to pipe diameter,
Cg: correction factor for topography and ground,
Cl: correction coefficient for liquefaction,
α: Maximum acceleration of ground motion ([gal] or [cm / sec2]),
[0023]
In the process of step # 102, since the pipe damage rate (Rm) is obtained for all the pipes constituting the pipe network PN, the pipe lines for all the pipes constituting the pipe network PN are obtained. Based on the information in the information file Fa, the pipe type and pipe diameter are given, and the correction coefficient (Cg) related to topography and ground, correction coefficient (Cl) related to liquefaction, earthquake motion, etc. Arithmetic processing based on the maximum acceleration (α) is performed. The correction coefficient (Cg) related to the terrain / ground and the correction coefficient (Cl) related to liquefaction can be stored in the pipeline information file Fa. In order not to increase, a layer that manages this information for each area is used, this layer is overlaid on the area where the pipe network PN exists, and the information set in the layer is given to each of the overlapped pipes. It is effective to set the processing mode so that it is performed. In addition, the maximum acceleration (α) of the earthquake motion is set for the layer corresponding to the area, and the information set for this layer is superposed on the pipe network PN so that the information on the earthquake motion can be obtained for each pipeline. The processing form is set to be given to
[0024]
In step # 103, processing is performed to estimate the pipe damage probability (Pf) from the pipe damage rate (Rm) estimated for all pipes and the pipe length information (L) (pipe length). The pipe damage probability (Pf) is given by the following equation.
[0025]
Pf = 1−EXP (−Rm × L),
L: pipeline length,
[0026]
In step # 104, the damaged pipeline is estimated based on the probability theory based on the random number from the pipeline damage probability (Pf) obtained as described above. Damaged pipes are pipes that generate water leakage, and are compared by comparing the magnitude relationship between the pipe damage probability (Pf) set for each pipe and the random number generated by the system. Therefore, if the random number value is smaller than the value of the pipeline damage probability (Pf), it is estimated that damage will be caused, and if the random number value is larger than the value of the pipeline damage probability (Pf), no damage will be caused. This estimation is repeated about 100 times, and if it is determined that it will be damaged even once, it is estimated that it will be damaged.
[0027]
In step # 105, the identification information of the damaged pipeline (damaged pipeline) estimated to be damaged is stored in a memory or the like.
[0028]
The damage estimation process (#B) calculates the amount of water leakage for all damaged pipelines, analyzes the amount of water leakage in each pipeline, and determines the area where water is shut off from the pressure drop due to this water leakage. As shown in the flowchart of FIG. 12, the process sets identification information to identify each damaged pipeline stored in the step # 105 (step # 201). Then, the removal amount (Wo) of the leakage pipe is set to the temporary water amount (Wt), and the water pressure (Ho) of the leakage pipe is set to the temporary water pressure (Ht) (Step # 202). Next, the amount of water leakage (Rt) is calculated from this temporary water pressure (Ht) (step # 203). For this calculation, as shown in FIG. 13, an expression is used to indicate that the water pressure and the amount of water leak are in the 1.15th power relationship (in FIG. It is shown).
[0029]
Next, the amount of water leakage (Rt) is added to the pipe removal amount (Wo), and the pipe water pressure (Hpt) is calculated from the result (Wt) (Step # 204). The temporary water pressure (Ht) and the pipe line are calculated. The average value of the water pressure (Hpt) is set to the temporary water pressure (Ht) (step # 205), and the absolute value of the temporary water pressure (Ht) and the pipe water pressure (Hpt) becomes smaller than a preset threshold value #. Steps 203 to # 205 are repeated (repeated), and when the absolute values of the temporary water pressure (Ht) and the pipe water pressure (Hpt) become smaller than a preset threshold value (when converged), After the repetition, the pipe water pressure (Hpt), or the water pressure of the pipe connected to the pipe, is compared with the water shutoff pressure, and the pipe that falls into the water shutoff state is distinguished from the pipe that can be supplied with water. Information indicating the water outage area is displayed on the display 1 and a memo It has become to perform the processing to be stored in (# 206 - 208 steps). When the above-described steps # 203 to # 205 are repeated, as shown in the graph of FIG. 14, the temporary water pressure (Ht), the water leakage amount (Rt), and the pipe water pressure (Hpt. And the water pressure (Ht), the water leakage amount (Rt), and the pipe water pressure (Hpt) converge as a result of repeated treatment, and as a result, the water pressure can be given as the pipe water pressure.
[0030]
As shown in the flowchart of FIG. 15, the seismic anticipation process (#C) counts weight values K1 to K6 (collectively referred to as weight value K) based on the damage pipeline information and weighting information. The result of totaling (accumulating) the weight values K1 to K6 is compared and displayed on the display 1 as the priority order of the pipes to be made earthquake resistant from the pipe having the largest total value, and then the set weight value K or more The display 1 is displayed on the assumption of the pipes to be made earthquake-resistant based on the number of pipes set or the number of pipes set, and the information of the pipes thus assumed is stored in the memory. (Steps # 301 to 303). In addition, when performing the process of automatically setting the pipe to be quake resistant as in this process, the pipe to be quake proof is displayed according to the priority order based on the weight value K, and displayed in this way. The operator selects an arbitrary number of pipes to be made earthquake-resistant from the top, or the operator inputs a weight value as a threshold to be made earthquake-proof from those displayed in this way. It is also possible to carry out by setting a processing form so as to select a pipeline that should be earthquake-resistant as a weight value.
[0031]
Further, this weight value is set for each pipeline based on the processing of FIG. Specifically, the damage rate (Rm) of the pipeline, the degree of aging of the pipeline (Y), the location of the pipeline (SP), the water supply point (DP), the flow rate ratio (Wq) of the pipeline A weight value is given corresponding to the average pressure change amount (Ap) of the pipeline and the population to be reduced in pressure (Lp), and the damage rate (Rm) is a correction coefficient (α1) of the pipeline The result of multiplying the damage rate (Rm) by the weight value (K1) is given as the weight value (K1), and the degree of aging (Y) is weighted by the result of multiplying the correction coefficient (α2) of the pipe and the degree of aging (Y). As a value (K2), for the laying position (SP), the result of multiplying the correction coefficient (α3) and importance score (N) of the pipeline is given as a weight value (K3), and the water supply point (DP) For, weight the result of multiplying the correction coefficient (α4) of the pipeline from the water source S to the water supply point DP and the importance score (N) (K4), and the flow rate ratio (Wq) is obtained by multiplying the correction coefficient (α5) and importance score (N) of the pipeline as a weight value (K5), and the average pressure change amount (Ap ), The result of multiplying the correction coefficient (α6) of the pipeline and the importance score (N) is given as a weight value (K6), and for the low-pressure target population (Lp), the correction coefficient of the pipeline A process of giving the result of multiplying (α7) and the importance score (N) as a weight value (K7) is performed in advance.
[0032]
In the damage rate (Rm), the higher the damage rate (Rm), the higher the weight value (K1). In the aging degree (Y), the higher the aging degree, the larger the weight value (K2). Pipes that supply water to the water supply point (DP) with a large importance score (N) set for emergency roads that cannot be immediately restored at the installation position (SP) On the road, pipes to be supplied to the water supply points (DP) of hospitals and public facilities where residents evacuate in the event of a disaster are extracted, and the higher the importance set by the operator for these pipes, the higher the importance score ( N) is set, and in the flow rate ratio (Wq), the greater the flow rate that flows through the pipeline, the larger the importance score (N) is set, and the average pressure change (Ap) causes damage. Sometimes the pressure change on the entire pipeline is large The importance score (N) with a larger value is set for the pipeline, and the importance score (N) is set for the low pressure target population (Lp) as the population whose pressure is low or the water is shut off at the time of damage. To do. The correction coefficients α1 to α7 are arbitrarily set by the operator in order to make the weight values consistent. When setting the weight value, for example, in the case of the damage rate (Rm), the damage rate (Rm) is associated with the weight value and stored in a table format, and is read from the table when the weight value is given. It is also possible to set the processing form.
[0033]
Next, a process for selecting the main line M that sends water from the water source S to the water supply point DP will be described. When this processing is performed, the entire pipe network PN is displayed on the display 1 based on the information from the pipe line information file Fa as described above, and in the state displayed in this way, as shown in the flowchart of FIG. In addition, it becomes possible by executing a main line search routine as main line search means of the present invention. In other words, when this routine is executed, a message indicating that the water supply point DP should be selected is displayed, and in accordance with this instruction, the mouse 5 or the keyboard 4 is operated to move the cursor to a hospital or school or public facility where residents are evacuated during an earthquake. Alternatively, the water supply point DP is designated by an operation such as setting a fire hydrant or the like at a position that enables efficient fire extinguishing when a fire occurs and operating the switch of the mouse 5 (step # 401).
[0034]
When performing this designation, as shown in FIG. 18, it is also possible to open another window W2 with respect to the display 1 and designate the water supply point DP in a state where an enlarged pipe network is displayed in this window W2. . Then, in the pipe network PN schematically shown in FIG. 17, when the maximum flow rate is sent to the route (main trunk line M) indicated by the broken line, when the water supply point DP is specified, this water supply The intersection point P1 closest to the point DP is extracted, all the paths connected to the intersection point P1 are extracted, and then the flow direction and the flow rate of each of the plurality of extracted paths are determined by hydraulic analysis. Obtaining and performing a process of extracting the path having the maximum flow rate from the paths for feeding water to the intersection. Next, the upstream intersection P2 in the extracted path is obtained, all connected paths are extracted even at the intersection P2, the flow direction and flow rate of the route are obtained by hydraulic analysis, and the maximum flow rate is obtained. In the same figure, the process of extracting the path to be obtained is sequentially obtained for intersections P3 to P6 until it is determined that the path is directly connected to the water source S, and when it is determined that the path is directly connected to the water source S (# 402). Step # 405), the process of extracting the intersection is stopped, the route extracted so far and the route extracted last are set as the main line M and displayed on the display 1 (see the figure), The name of this water supply point DP is added, and processing for storing (storing) information for identifying a plurality of pipelines constituting the main line M for this water supply point DP is performed (# 408, #). 409 step)
[0035]
The main line M extracted in this way is displayed in an overlapping manner with the pipe network PN displayed on the display 1, and the color of the pipe line indicating the main line is made different in this display. It is emphasized by blinking. Moreover, the main line is a combination of a plurality of pipes formed from the water source S to the water supply point DP as described above, and the information for identifying the pipes identifies these pipes. Therefore, the operator performs an operation of arbitrarily setting the importance score (N) for the pipelines constituting the main line M corresponding to these water supply points DP. In addition, in the seismic cost calculation process (#C ′), an amount obtained by accumulating the respective construction costs when replacing the pipes assumed to be seismic resistance in the seismic resistance assumption process (#C) is stored.
[0036]
The second estimation process (#D) is different from the first estimation process (#A) described above except that a part of the pipeline is earthquake-resistant in the earthquake resistance assumption process (#C). The damage estimation process (#E) performed thereafter is not different from the above-described damage estimation process (#B).
[0037]
The comparison process (#F) is a process for comparing the water shutoff area estimated in the damage estimation process (#B), the water shutoff rate, and the water shutoff area estimated in the damage estimation process (#E) with the water shutoff rate. , Output processing (#G), for example, as shown in FIG. 20, the window W3 is opened on the display 1, and the population and rate of water interruption between “before earthquake resistance” and “after earthquake resistance” are expressed numerically. At the same time as the display, the area where water is shut off in the pipe network PN is displayed (hatched area in the figure) so that the operator can easily grasp the damage comparison. Further, this system is configured so that the printer 6 can print the comparison result and the construction cost required for earthquake resistance.
[0038]
As described above, in the present invention, the basic processing mode is set so as to estimate the damaged pipelines of the pipelines constituting the pipe network PN based on the earthquake information. However, not only can simulations for earthquakes with different seismic intensities be easily performed, but the water outage population and water outage rate based on the damage pipeline estimated in this way are obtained and stored, and the estimated damage pipeline is Based on the rules set in advance, the earthquake is assumed to be earthquake-resistant, and the water-disruption population and water-disruption rate are calculated from the earthquake damage to the pipelines that are supposed to be earthquake-resistant in this way. By comparing, it is possible to compare the evaluation of the pipe network before and after earthquake resistance, and to calculate the construction cost necessary for earthquake resistance.
[0039]
In particular, when estimating damaged pipes for earthquakes, the damage probability of pipes included in each area Z is determined for each of the areas Z divided into meshes, and the damage is determined by comparing the random number with a random number of times. Since the pipeline is estimated, it is easy to assume and based on the theory of probability, a reasonable pipeline is extracted. Based on this amount of leakage, a process for determining the amount of leakage from the water pressure of the damaged pipeline extracted in this way It is possible to obtain the water pressure of the pipe line with high accuracy by repeating (repetitively) the process of obtaining the water pressure until it converges, and among the multiple damaged pipe lines estimated by the earthquake, Since pipes to be seismic resistant are selected according to preset rules, it will not be time-consuming to select, and as a result of selection based on these rules, not only will the improvement of the water cutoff population and water cutoff rate be affected, but there will be damage. And Reduce damage to existing pipes, promote seismic resistance of highly-aged pipes, save time in restoration work in the event of an earthquake disaster, maintain water supply to hospitals and public facilities in the event of an earthquake disaster, In the event of an earthquake disaster, the water cutoff area is reduced, and in the event of an earthquake disaster, the pressure drop across the entire pipe network PN is reduced. In addition, since it is possible to use the pipe line information file Fa for managing the pipe network PN in municipalities, it is not necessary to convert the pipe network PN into data, and processing can be performed easily.
[0040]
Then, when extracting the main line M for maintaining the water supply to the hospital or public facilities from the pipe network, an operation for designating the water supply point DP in the pipe network displayed on the display 1 is performed. The main line M is extracted simply by executing the search process.
[Brief description of the drawings]
FIG. 1 is an overall view of a system.
FIG. 2 shows a pipe network
FIG. 3 is a block diagram showing the flow of processing.
FIG. 4 is a block diagram showing the flow of information.
FIG. 5 is a flowchart of first estimation processing.
FIG. 6 is a diagram showing a mesh set in a pipe network
FIG. 7 is a diagram showing the structure of a pipeline information file
FIG. 8 is a list of correction factors related to pipe types.
FIG. 9 is a list of correction factors related to pipe diameters.
Fig. 10 List of correction factors related to topography and ground
FIG. 11 is a list of correction coefficients related to liquefaction.
FIG. 12 is a flowchart of damage estimation processing.
FIG. 13 is a graph showing the relationship between water pressure and water leakage
FIG. 14 is a graph showing changes in water leakage amount, temporary water pressure, and water pressure during water pressure analysis of a water leakage pipe
FIG. 15 is a flowchart of anti-seismic assumption processing.
FIG. 16 is a table listing weighting processing formulas.
FIG. 17 is a schematic diagram of a pipe network.
FIG. 18 is a diagram showing a state in which the entire pipe network and a part of the pipe network are displayed on the display.
FIG. 19 is a flowchart of a main line exploration routine.
FIG. 20 is a diagram showing a state in which the comparison result is displayed on the display.
[Explanation of symbols]
1,6 output device
3 processing equipment
2 storage means

Claims (4)

Main line search for the main line consisting of the maximum flow path among the multiple paths between the water supply point and the water source by arbitrarily specifying the water supply point for the pipe network to which water from the water source is supplied And a processing device for outputting the main line thus obtained to the output device, and the main line search means supplies the most water to the intersection point closest to the water supply point. And repeat the process according to the rule to extract the route that supplies the most water to the intersection on the upstream side of the extracted route until the water source is reached. A trunk line search system configured to perform processing for setting a trunk line. A processing mode in which the main line search means obtains the flow direction and flow rate of water in a plurality of pipelines connected to the intersection by hydraulic analysis, and extracts the flow rate of the largest flow rate among the flow directions on the side where water is fed. The main line search system according to claim 1, wherein: The output device is composed of a display for displaying a pipe network, and a water supply point is set by pointing means for this display. After this setting, extraction of the main line by the main line search means is performed. The main line search system according to claim 1 or 2, wherein a processing form of the processing device is set so as to display a route from a water source to a water supply point on a display. The main line search system according to any one of claims 1 to 3, wherein the main line search system is configured to synthesize and use a plurality of pipe laying information stored in a storage unit as a pipe network.

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