A sewer network cost evaluation method and device and electronic equipment

Abstract

The present application relates to the technical field of engineering cost evaluation, and discloses a kind of drainage pipe network cost evaluation method, device and electronic equipment, method includes: obtaining the geographical data of the area where the to-be-built drainage pipe network is located;According to the geographical data of the to-be-built drainage pipe network, the design sewage flow of the to-be-built drainage pipe network and the pipe top soil depth are determined;According to the design sewage flow of the to-be-built drainage pipe network, the pipe diameter of the to-be-built drainage pipe network is calculated;According to the pipe diameter of the to-be-built drainage pipe network and the pipe top soil depth, the unit length cost of the to-be-built drainage pipe network is calculated;According to the unit length cost of the to-be-built drainage pipe network and pipe segment length, the total cost of the to-be-built drainage pipe network is determined.The present application changes the traditional experience judgment into quantifiable, standardized calculation method for pipe network construction and repair cost evaluation, and significantly improves the cost evaluation accuracy through multi-dimensional parameter fusion, to provide decision support for urban pipe network reconstruction work.

Description

Technical Field

[0001] This invention relates to the field of engineering cost assessment technology, specifically to a method, apparatus, and electronic equipment for assessing the cost of drainage pipe networks. Background Technology

[0002] The ongoing urbanization process in my country has led to the concentration and expansion of urban populations, placing an unbearable burden on the existing drainage networks of many cities. This is particularly evident in older urban areas, where aging systems suffer from corrosion, loose joints, and settlement deformation, making them ill-equipped to cope with extreme rainfall events and exacerbating the risk of urban flooding. Simultaneously, with increasing societal emphasis on ecological civilization, urban drainage networks are facing higher environmental protection requirements. Traditional combined sewer systems are prone to sewage overflows during heavy rains, polluting water bodies. Promoting the separation of rainwater and sewage, i.e., establishing independent rainwater and sewage discharge systems, has become a crucial task in the modernization of urban drainage networks. This has also created an urgent need for scientific and refined methods for assessing the costs of new construction / repair of urban drainage networks.

[0003] Current traditional assessment methods often rely on single, static, empirical parameters, such as estimations based solely on pipe diameter and length. These methods depend heavily on manual experience and neglect the influence of crucial factors like construction environment, repair difficulty, and site conditions, resulting in significant errors in the estimation results. Furthermore, traditional assessment methods lack flexibility, serving as general templates that are unsuitable for new construction and repair projects of different types and in different cities.

[0004] In summary, current cost assessment methods for new pipeline construction and repair lack scientific, accurate, and refined approaches. The core value of this invention lies in transforming the cost assessment of new pipeline construction and repair from traditional experience-based judgment to a quantifiable and standardized calculation method. By integrating multi-dimensional parameters, it significantly improves the accuracy of cost assessment and provides decision support for urban pipeline renovation. Summary of the Invention

[0005] This invention provides a method, apparatus, and electronic device for cost assessment of drainage pipe networks, in order to solve the problem that current cost assessment work for new construction and repair of pipe networks lacks scientific, accurate, and refined methods.

[0006] In a first aspect, the present invention provides a method for evaluating the cost of drainage pipe networks, the method comprising: Obtain geographical data of the area where the drainage pipeline to be built is located; based on the geographical data, determine the design sewage flow rate and the soil cover depth of the pipeline; calculate the pipe diameter based on the design sewage flow rate; calculate the unit length cost of the pipeline based on the pipe diameter and the soil cover depth, the unit length cost being determined by the sum of pipe material cost, earthwork excavation cost, and a cost constant; and determine the total construction cost of the drainage pipeline based on the unit length cost and the pipe segment length.

[0007] The drainage pipe network cost assessment method provided by this invention first obtains the geographical data of the area where the drainage pipe network to be built is located. Based on this geographical data, the compatibility of design parameters with the actual conditions of the area is ensured. The design sewage flow rate and the depth of soil cover over the pipe are calculated based on the geographical data, ensuring compatibility with the scale of sewage generation and topographic conditions of the area. Furthermore, the pipe diameter is determined based on the design sewage flow rate to meet the normal sewage transport needs of the area, avoiding congestion and cost waste. Then, based on the calculated pipe diameter and the depth of soil cover over the pipe, the unit length cost of the drainage pipe network to be built is determined, ultimately obtaining the total cost of the drainage pipe network to be built. This provides a logically clear and data-supported cost accounting path for new drainage pipe network projects, effectively solving the problem of poor regional adaptability caused by reliance on experience in traditional pipe network cost assessments. In one optional embodiment, determining the design sewage flow rate of the drainage pipe network to be built based on the geographical data includes: Obtain the population density, service area, average daily flow, and per capita sewage production from the geographical data of the drainage network to be built; multiply the population density by the service area to obtain the number of people served; determine the design sewage flow rate of the drainage network to be built based on the number of people served, per capita sewage production, and the coefficient of variation of comprehensive domestic sewage volume. The coefficient of variation of comprehensive domestic sewage volume is determined by the average daily flow rate.

[0008] The drainage pipe network cost assessment method provided by this invention uses real geographical data of the area where the drainage pipe network to be built is located to calculate the design sewage flow rate, which solves the problems of vague data sources and incoherent logic in traditional flow estimation, and ensures that the design sewage flow rate is accurately matched with the population distribution, spatial range and pollution generation characteristics of the service area, thereby improving the accuracy of the cost assessment of new pipe network construction.

[0009] In one optional implementation, the design overburden depth of the drainage network to be constructed is determined based on the geographical data of the network, including: Obtain the minimum soil cover depth and elevation data from the geographical data of the drainage pipe network to be built; calculate the terrain elevation difference compensation of the drainage pipe network to be built based on the elevation data; add the minimum soil cover depth and the terrain elevation difference compensation to obtain the design soil cover depth of the drainage pipe network to be built.

[0010] The drainage pipe network cost assessment method provided by this invention first obtains the minimum cover depth required by geographic data to meet the specifications for pipe load resistance and damage prevention, as well as elevation data reflecting the regional topographic relief. Then, based on the elevation data, it quantifies the terrain elevation difference compensation to accurately adapt to the regional topographic relief characteristics. Finally, the minimum cover depth is added to the terrain elevation difference compensation to obtain the design pipe top cover depth that meets both the minimum specifications and the actual regional topography. This avoids the risk of pipe damage due to insufficient cover depth and prevents the waste of excavation costs caused by excessive cover depth, ensuring the rationality and practicality of the cost assessment.

[0011] In one optional implementation, the pipe diameter of the drainage network to be constructed is calculated based on the design sewage flow rate, including: The pipe diameter of the drainage network to be built is determined using the Manning formula based on the design sewage flow rate of the network.

[0012] The drainage network cost assessment method provided by this invention calculates the pipe diameter of the drainage network to be built based on the quantitative relationship between flow rate, flow velocity, and hydraulic radius in the Manning formula. This avoids the pipe diameter deviation caused by traditional experience estimation, ensures that the pipe diameter is accurately matched with the design sewage flow rate, and improves the accuracy of the network cost assessment.

[0013] In one optional implementation, the unit length cost of the drainage network to be constructed is calculated based on the pipe diameter and the depth of soil cover over the pipe. The unit length cost is determined by the sum of pipe material cost, earthwork excavation cost, and a cost constant, including: Obtain the pipe material cost coefficient, pipe diameter cost nonlinear influence coefficient, earthwork excavation cost coefficient, and cost constant for the drainage pipeline network to be constructed; determine the pipe material cost of the drainage pipeline network to be constructed based on the pipe diameter, pipe material cost coefficient, and pipe diameter cost nonlinear influence coefficient; determine the earthwork excavation cost of the drainage pipeline network to be constructed based on the soil cover depth, pipe diameter, and earthwork excavation cost coefficient; add the pipe material cost, earthwork excavation cost, and cost constant of the drainage pipeline network to be constructed to obtain the unit length cost of the drainage pipeline network to be constructed.

[0014] The drainage pipe network cost assessment method provided by this invention first obtains core quantitative parameters based on the pipe network operation status, and then accurately calculates the pipe material cost based on the pipe diameter and pipe material cost coefficient, as well as the nonlinear influence coefficient of pipe diameter cost, thus conforming to actual material consumption and production patterns. Furthermore, it calculates the excavation cost by combining the depth of soil cover above the pipe, the pipe diameter, and the earthwork excavation cost coefficient, adapting to the actual excavation workload under different burial depths and pipe diameters. Finally, it overlays a cost constant to cover fixed costs such as pipe joints and foundation fixed expenditures, thus fully constituting the unit length cost, providing reliable unit cost support for subsequent total cost accounting.

[0015] In an optional implementation, the above-mentioned drainage network cost assessment method further includes: Obtain the inspection length, service life, density of misconnections, complexity of repair methods, and construction environment penalty factor of the drainage network to be repaired; calculate the network repair strength coefficient based on the density of misconnections, complexity of repair methods, and construction environment penalty factor; calculate the unit length cost of the drainage network to be repaired based on the network repair strength coefficient and service life; determine the total cost of the drainage network to be repaired based on the unit length cost and inspection length.

[0016] The drainage pipe network cost assessment method provided by this invention considers the actual operating conditions of the drainage pipe network to be repaired. It derives a pipe network repair strength coefficient based on the density of misconnections, the complexity of the repair method, and the construction environment penalty factor, which is used to quantify the repair intensity. Furthermore, by using the pipe network repair strength coefficient and the pipe network's age, the repair cost per unit length is calculated, ultimately yielding the total repair cost. This method achieves refined and quantifiable calculation of pipe network repair costs, accurately matches different repair projects, and improves the accuracy of the assessment.

[0017] In one optional implementation, the repair strength coefficient of the drainage network to be repaired is calculated based on the density of misconnection defects, the complexity of the repair method, and the construction environment penalty factor. This includes: weighting and summing the density of misconnection defects, the complexity of the repair method, and the construction environment penalty factor to obtain the repair strength coefficient of the drainage network to be repaired.

[0018] The drainage pipe network cost assessment method provided by this invention introduces a pipe network repair strength coefficient, which includes factors such as the density of misconnection defects, the complexity of repair methods, and the penalty factors of the construction environment. It comprehensively assesses the pipe network to be repaired, realizes the quantification of the repair strength of the drainage pipe network to be repaired, and facilitates the subsequent pipe network repair cost assessment.

[0019] In one optional implementation, the unit length cost of the drainage network to be repaired is calculated based on the network repair strength coefficient and the network service life, including: Obtain the network age impact factor and benchmark repair cost of the drainage network to be repaired; calculate the accelerated failure factor of the drainage network to be repaired based on the network age impact factor and the service life of the network; multiply the network repair strength coefficient, accelerated failure factor and benchmark repair cost of the drainage network to be repaired to obtain the unit length cost of the drainage network to be repaired.

[0020] The drainage pipe network cost assessment method provided by this invention calculates the unit length repair cost by correlating the repair difficulty, aging degree and basic cost, ensuring that the repair cost assessment is consistent with the actual aging state of the pipe network, and improving the accuracy and reliability of the repair cost assessment.

[0021] Secondly, the present invention provides a drainage pipe network cost assessment device, the device comprising: The data acquisition module is used to acquire geographic data of the area where the drainage pipe network to be built is located; The basic parameter calculation module is used to determine the design sewage flow rate and the soil cover depth of the drainage network to be built based on the geographical data of the drainage network to be built. The pipe diameter calculation module is used to calculate the pipe diameter of the drainage network to be built based on the design sewage flow rate of the drainage network to be built. The unit length cost calculation module is used to calculate the unit length cost of the drainage network to be built based on the pipe diameter and the soil cover depth of the pipe top. The unit length cost is determined by the sum of the pipe material cost and the earthwork excavation cost. The cost assessment module is used to determine the total construction cost of the drainage network to be built based on the unit length cost and the length of the pipe segment.

[0022] Thirdly, the present invention provides an electronic device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the drainage network cost assessment method of the first aspect or any corresponding embodiment described above.

[0023] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the drainage network cost assessment method of the first aspect or any corresponding embodiment described above.

[0024] Fifthly, the present invention provides a computer program product, including computer instructions for causing a computer to execute the drainage network cost assessment method described in the first aspect or any corresponding embodiment thereof. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of an application scenario according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating the drainage network cost assessment method according to an embodiment of the present invention; Figure 3 This is a structural block diagram of a drainage network cost assessment device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] As an optional application scenario of this invention, such as Figure 1 As shown, the drainage network cost assessment system may include at least one terminal device and at least one server. Figure 1 The system is illustrated in the example, which includes a computer 101, a mobile terminal 102, and a server 103, and the terminal devices such as the computer 101 and the mobile terminal 102 are connected to the server 103 through a network 110.

[0031] Specifically, the terminal device can be a smartphone, tablet, laptop, PDA, desktop computer, game console, smart TV, smart wearable device, in-vehicle terminal, VR (Virtual Reality) device, AR (Augmented Reality) device, etc. Server 103 can be a standalone physical server, a server cluster, a distributed system, or a cloud server providing cloud services. Network 110 can be a wired or wireless network, examples of which include, but are not limited to, the Internet, corporate intranet, local area network, wide area network, mobile communication network, and combinations thereof.

[0032] This invention provides a method for cost assessment of drainage pipe networks. By transforming the cost assessment of new construction and repair of pipe networks from traditional experience-based judgment to a quantifiable and standardized calculation method, the accuracy of cost assessment is significantly improved, providing decision support for urban pipe network renovation.

[0033] According to an embodiment of the present invention, a method for cost assessment of drainage pipe networks is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0034] This embodiment provides a method for evaluating the cost of drainage pipe networks, which can be used on the aforementioned mobile terminals, such as mobile phones and tablets. Figure 2 This is a flowchart of a drainage network cost assessment method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps: Step S201: Obtain the geographical data of the area where the drainage pipe network to be built is located.

[0035] In one optional embodiment, the design, construction, and cost of the drainage network are all related to the geographical conditions of the area, wherein the acquired geographical data includes: 1. Basic project data: pipeline network GIS drawings, pipeline length, pipe diameter, material, burial depth, service life, location and number of manholes, topography, geological survey report, etc., mainly from design units, geological survey units, etc.

[0036] 2. Cost data: material prices, equipment rental fees, labor rates, transportation costs, earthwork disposal fees, special expenses, etc., mainly sourced from supplier quotations, procurement platforms, labor market research, industry quota standards, historical project settlement data, and information released by price authorities.

[0037] 3. Technical parameter data: Manning roughness coefficient, construction process efficiency, repair method complexity coefficient, environmental penalty factor, equipment performance parameters, mainly derived from industry technical specifications, construction manuals, expert consultations, summaries of historical engineering cases, and internal enterprise databases.

[0038] 4. External environment data: number of people served, population density, service area, weather and climate conditions, average daily flow, per capita pollution generation, terrain altitude, policies, regulations and standards, market fluctuations, traffic management requirements, and special area restrictions. These data are mainly obtained from meteorological departments, government housing and construction / environmental protection departments' announcements, market analysis reports, traffic management departments, and on-site surveys.

[0039] Step S202: Based on the geographical data of the drainage network to be built, determine the design sewage flow rate and the soil cover depth of the top of the pipe network.

[0040] In one optional embodiment, the design sewage flow rate is a calculated flow rate determined to meet the peak sewage discharge demand within the service area, and is the core basis for the design of pipe network diameter and slope. The soil cover depth is the vertical distance from the top of the drainage pipe to the ground, which is determined by the superposition of the minimum soil cover depth and the terrain elevation difference compensation, adapting to terrain conditions and construction specifications.

[0041] Specifically, the design sewage flow rate determines the carrying capacity of the drainage network and must match the scale of sewage generation in the area where the network is located. The soil cover depth on top of the pipe determines the laying requirements of the drainage network and must be adapted to the terrain conditions of the area where the network is located. Both are derived from the obtained geographical data.

[0042] Step S203: Calculate the pipe diameter of the drainage network to be built based on the design sewage flow rate of the drainage network to be built.

[0043] In one optional embodiment, the pipe diameter, typically a circular pipe, is the inner diameter of the drainage pipe and is a core engineering parameter for matching sewage transport capacity. Its size must precisely match the design sewage flow rate. Based on the calculated design sewage flow rate of the drainage network to be constructed, the pipe diameter that can ensure the normal transport of sewage by the network can be derived.

[0044] Step S204: Calculate the unit length cost of the drainage network to be built based on the pipe diameter and the soil cover depth of the pipe top. The unit length cost is determined by the sum of the pipe material cost, earthwork excavation cost, and cost constant.

[0045] In one optional embodiment, the cost of pipe material is strongly correlated with the pipe diameter, that is, the larger the pipe diameter, the more pipe material is used. The cost of earthwork excavation is strongly correlated with the depth of soil cover over the pipe, that is, the deeper the soil cover, the greater the amount of excavation work. Then, a cost constant is added to calculate the cost per unit length of the drainage pipe network.

[0046] Step S205: Determine the total construction cost of the drainage network to be built based on the unit length cost and the length of the pipe segment.

[0047] In one alternative embodiment, the total cost of constructing the drainage network is obtained by multiplying the unit length cost of the drainage network to be constructed, the length of the pipe segment, and the adjustment parameters.

[0048] The adjustment coefficients include the geological risks, construction difficulties, and regional economic factors of the area where the drainage pipeline to be built is located.

[0049] The drainage pipe network cost assessment method provided in this embodiment first obtains the geographical data of the area where the drainage pipe network to be built is located. Based on the geographical data, the adaptability of design parameters to the actual conditions of the area is ensured. The design sewage flow rate and the soil cover depth of the pipe top of the drainage pipe network are calculated based on the geographical data, which are adapted to the scale of sewage generation and topographic conditions of the area. Furthermore, the pipe diameter of the drainage pipe network is determined based on the design sewage flow rate to meet the normal sewage transportation needs of the area and avoid problems such as congestion and cost waste. Then, based on the calculated pipe diameter and soil cover depth, the unit length cost of the drainage pipe network to be built is determined, and finally the total cost of the drainage pipe network to be built is obtained. This provides a logically clear and data-supported cost accounting path for new drainage pipe network projects, effectively solving the problem of poor regional adaptability caused by the reliance on experience in traditional pipe network cost assessment.

[0050] In some alternative implementations, the design sewage flow rate of the drainage network to be constructed is determined based on the geographical data of the network, including: Step a1: Obtain population density, service area, average daily flow, and per capita pollution generation from the geographical data of the drainage network to be built.

[0051] In one optional embodiment, population density refers to the number of people per unit area (in km²) within the service area of ​​the drainage network to be built, and is a core geographical parameter for quantifying the degree of population agglomeration in a region.

[0052] Service area refers to the geographical area actually covered by the drainage network to be built and providing sewage discharge services. The unit is usually km², and it is a parameter that defines the scale of the network's service targets. Average daily flow rate refers to the average daily sewage discharge within the service area of ​​the drainage network to be built over a period of time (usually one year), and the unit is usually L / s.

[0053] Per capita wastewater production refers to the average daily wastewater volume generated per person within the service area of ​​the planned drainage network, expressed in liters (L / person). day.

[0054] Step a2: Multiply the population density by the service area to obtain the number of people served.

[0055] In an alternative embodiment, the number of people served is calculated by the following relationship (1): (1) In the formula, S represents population density, and S represents the service area.

[0056] Step a3: Determine the design sewage flow rate of the drainage network to be built based on the number of people served, the per capita sewage production, and the comprehensive domestic sewage volume variation coefficient. The comprehensive domestic sewage volume variation coefficient is determined by the average daily flow rate.

[0057] In one optional embodiment, the design sewage flow rate of the drainage network to be constructed It can be calculated using the following relation (2): (2) In the formula, To serve the population, Pollution per capita (L / person) day), This is the coefficient for the overall change in domestic sewage volume.

[0058] Among them, the coefficient of variation of comprehensive domestic sewage volume The results can be found in Table 1 below: Table 1

[0059] The drainage pipe network cost assessment method provided in this embodiment uses real geographical data of the area where the drainage pipe network to be built is located to calculate the design sewage flow rate. This solves the problems of vague data sources and incoherent logic in traditional flow estimation, and ensures that the design sewage flow rate is accurately matched with the population distribution, spatial range and pollution generation characteristics of the service area, thereby improving the accuracy of the cost assessment of new pipe network construction.

[0060] In some optional implementations, the design overburden depth of the drainage network to be constructed is determined based on geographical data, including: Step b1: Obtain the minimum soil cover depth and elevation data from the geographic data of the drainage pipe network to be constructed.

[0061] In one optional embodiment, the minimum cover depth refers to the minimum vertical distance from the top of the drainage pipe to the ground. It is the minimum limit specified in the standard to meet the requirements of the pipe for resisting ground loads, preventing freezing, and preventing damage. It can be obtained by referring to the relevant standard requirements of the area where the pipe network is located.

[0062] In one optional embodiment, elevation data refers to the topographic elevation data within the service area of ​​the drainage network to be constructed, reflecting the topographic undulations of the area and the height differences at different points, and can be obtained based on the geographical data of the area.

[0063] Step b2: Calculate the terrain elevation difference compensation for the drainage pipe network to be built based on the elevation data.

[0064] In one alternative embodiment, terrain elevation compensation is an additional depth that must be added to overcome the terrain undulations along the pipeline laying path while meeting the minimum cover depth requirement.

[0065] Furthermore, the terrain elevation compensation is calculated for an entire pipe segment, from the upstream starting point to the downstream ending point. Since sewage transport in drainage networks relies on gravity for unidirectional flow, the depth of the soil cover directly determines the hydraulic gradient of the pipeline. For example, a greater downstream soil cover depth means the downstream pipe bottom elevation is lower than or equal to the upstream pipe bottom elevation, creating a naturally descending slope along the flow direction, providing continuous momentum for sewage flow. If the downstream soil cover depth is less than the upstream, the pipe bottom elevation will be lower upstream and higher downstream, creating a reverse slope. Sewage will not only be unable to flow naturally but will also accumulate in the pipe, causing blockages and sewage backflow. Therefore, the soil cover depth at the downstream end must be greater than or equal to the soil cover depth at the upstream end.

[0066] Specifically, the terrain elevation compensation is obtained by adding the minimum hydraulic head required due to terrain descent to the acquired elevation data, and then subtracting the favorable elevation difference brought about by natural terrain descent.

[0067] Step b3: Add the minimum soil cover depth and the terrain elevation difference compensation to obtain the design soil cover depth of the drainage pipe network to be built.

[0068] In an optional embodiment, the design of the soil cover depth above the pipe is specified. It can be calculated using the following relationship (3): (3) In the formula, Minimum soil cover depth, This is for compensation of terrain elevation differences.

[0069] The drainage pipe network cost assessment method provided in this embodiment first obtains the minimum cover depth that meets the specifications for pipe load resistance and damage prevention from geographical data, as well as elevation data reflecting the regional topographic relief. Then, it quantifies the topographic elevation difference compensation based on the elevation data to accurately adapt to the regional topographic relief characteristics. Finally, the minimum cover depth is added to the topographic elevation difference compensation to obtain the design pipe top cover depth that meets both the minimum requirements of the specifications and the actual regional topography. This avoids the risk of pipe damage due to insufficient cover and prevents the waste of excavation costs caused by excessive cover, ensuring the rationality and practicality of the cost assessment.

[0070] In some optional implementations, the pipe diameter of the drainage network to be constructed is calculated based on the design sewage flow rate, including: The pipe diameter of the drainage network to be built is determined using the Manning formula based on the design sewage flow rate of the network.

[0071] In an alternative embodiment, the Manning formula is shown in the following relation (4): (4) In the formula, The average velocity of the cross section; It is the conversion factor; is the Manning coefficient, and is a dimensionless quantity; is the hydraulic radius; S is the slope of the hydraulic gradient or linear head loss.

[0072] Among them, hydraulic radius It can be calculated using the following relation (5): (5) (6) In the formula, For the cross-sectional area of ​​the pipe, For the perimeter of the pipe, The diameter of the drainage pipe network to be built.

[0073] Furthermore, the design wastewater flow rate can be calculated using the following equation (7): (7) (8) In the formula, To design wastewater flow rate, This represents the cross-sectional area of ​​the pipe.

[0074] Substituting equations (4), (5), (6), and (8) into equation (7) yields the following result: (9) Based on the above relationship (9), the design wastewater flow rate is known. Conversion coefficient Manning coefficient The pipe diameter can be determined by the slope S of the hydraulic gradient or linear head loss. .

[0075] The drainage network cost assessment method provided in this embodiment calculates the pipe diameter of the drainage network to be built based on the quantitative relationship between flow rate, flow velocity, and hydraulic radius in the Manning formula. This avoids the pipe diameter deviation caused by traditional experience estimation, ensures that the pipe diameter is accurately matched with the design sewage flow rate, and improves the accuracy of the network cost assessment.

[0076] In some optional implementations, step S204 specifically includes: Step c1: Obtain the pipe material cost coefficient, pipe diameter cost nonlinear influence coefficient, earthwork excavation cost coefficient, and cost constant for the drainage network to be built.

[0077] In one optional embodiment, the pipe cost coefficient is a dimensionless coefficient used in the calculation of the unit length cost of the pipeline network to quantify the weight of factors such as pipe material, market price, and production process on the cost of pipe.

[0078] In one optional embodiment, since the material usage, manufacturing process difficulty, transportation and installation costs of the pipe do not increase linearly when the pipe diameter increases, the nonlinear influence coefficient of pipe diameter cost is used to quantify the nonlinear relationship between pipe diameter and pipe material cost.

[0079] In an optional embodiment, since the amount of earthwork excavation is directly related to the depth of the pipe cover and the size of the excavation cross section due to the pipe diameter, and is affected by geological conditions, excavation methods, etc., the earthwork excavation cost coefficient is used to quantify the relationship between the depth of the pipe cover, the pipe diameter and the earthwork excavation cost.

[0080] In one alternative embodiment, the cost constant includes the cost of pipe joints and seals, the cost of fixed pipe foundation treatment per unit length, the fixed expenditure on pipe auxiliary fittings, and the cost of joint pressure testing, etc.

[0081] Step c2: Determine the pipe material cost of the drainage network to be built based on the pipe diameter, pipe material cost coefficient, and pipe diameter cost nonlinear influence coefficient.

[0082] In one alternative embodiment, the cost of pipe materials for the drainage network to be constructed The following relation (10) is used for calculation: (10) In the formula, For pipe cost coefficient, For the nonlinear influence coefficient of pipe diameter cost, The diameter is the pipe diameter.

[0083] Step c3: Determine the earthwork excavation cost of the drainage pipeline to be built based on the soil cover depth, pipe diameter, and earthwork excavation cost coefficient of the pipeline to be built.

[0084] In an alternative embodiment, the amount of earthwork excavation can be approximated by the burial depth. The cost of earthwork excavation is directly proportional to the pipe diameter. It mainly depends on the volume of earthwork that needs to be excavated and processed, which can be approximated as the volume of a trench with a trapezoidal or rectangular cross-section. The greater the burial depth, the deeper the trench needs to be dug, and the higher the cost. Similarly, the larger the pipe diameter, the thicker the pipe itself, and the wider the trench required, which also increases the cost.

[0085] Specifically, the earthwork excavation cost is obtained by multiplying the earthwork excavation cost coefficient, the soil cover depth above the pipe, and the pipe diameter.

[0086] Step c4: Add the cost of the pipe materials, the cost of earthwork excavation, and the cost constant of the drainage network to be built to obtain the cost per unit length of the drainage network to be built.

[0087] In an alternative embodiment, the unit length cost of the drainage network to be constructed can be calculated according to the following formula (10): (10) In the formula, To design the soil cover depth of the pipe top, For pipe diameter, , , These are the pipe material cost coefficient, the non-linear influence coefficient of pipe diameter cost, and the earthwork excavation cost coefficient, respectively. This is a cost constant.

[0088] The drainage network cost assessment method provided in this embodiment first obtains core quantitative parameters based on the network's operational status. Then, it accurately calculates pipe material costs based on pipe diameter and material cost coefficients, as well as the nonlinear influence coefficient of pipe diameter cost, aligning with actual material consumption and production patterns. Furthermore, it calculates excavation costs by combining the depth of soil cover above the pipe, pipe diameter, and earthwork excavation cost coefficients, adapting to the actual excavation workload under different burial depths and pipe diameters. Finally, it overlays cost constants to cover fixed costs such as pipe joints and foundation fixed expenditures, comprehensively constituting the unit length cost, providing reliable unit cost support for subsequent total cost accounting.

[0089] In some alternative implementations, the drainage network cost assessment method also includes: Step d1: Obtain the inspection length, service life of the drainage network to be repaired, density of misconnections, complexity of repair methods, and construction environment penalty factor of the network.

[0090] In one optional embodiment, the inspection length of the drainage network to be repaired is obtained by multiplying the total length of the network by the inspection coverage rate. The service life of the network refers to the number of years the drainage network to be repaired has been in service.

[0091] In one optional embodiment, the misconnection defect density is the number of misconnection defects present per unit length of pipeline, which can be detected using methods such as CCTV / QV. For example, if 5 misconnection points are found after inspecting 2 kilometers of pipeline, the misconnection defect density is 5 / 2 = 2.5 points / km.

[0092] In an optional embodiment, the repair method complexity (Fm) is used to measure the construction complexity and resource consumption of the selected repair technology itself. A benchmark assignment method can be used to set a benchmark complexity value for common repair processes. Assignment reference: 1. Site excavation and repair: The process is simple, but the excavation and restoration work is extensive. m =1.2; 2. Localized resin curing, point-like CIPP: trenchless, relatively simple process. m =1.0; 3. Mechanical spiral winding of the entire pipe section: trenchless, requires specialized equipment. m =1.5; 4. Pipeline section UV curing: Trenchless, high-tech, and with rigorous procedures. m =1.8; 5. Complete replacement or excavation of the entire pipe section: This involves the largest workload and has the greatest impact on the surrounding area. m =2.5.

[0093] In an optional embodiment, the construction environment penalty factor refers to a correction coefficient for increased costs and decreased efficiency due to construction environment limitations, with the following reference for assignment: 1. Suburbs / open land: Less interference, fewer traffic and noise restrictions. C p =1.0-1.2; 2. Residential communities: Residents' travel and noise restrictions must be considered. p =1.3-1.6; 3. Secondary arterial roads in the city: These require partial road occupancy, putting some pressure on traffic management. C p =1.5-2.0; 4. Main urban roads / commercial areas: Traffic management is complex, and nighttime construction may be necessary. p =2.0-3.0; 5. Historical preservation areas / hospitals / schools: These areas have extremely strict environmental, noise, and vibration restrictions, and the procedures are complex. p =3.0-4.0.

[0094] Step d2: Calculate the repair strength coefficient of the drainage network to be repaired based on the density of misconnection defects, the complexity of the repair method, and the construction environment penalty factor.

[0095] Step d3: Calculate the unit length cost of the drainage network to be repaired based on the network repair strength coefficient and the network service life.

[0096] Step d4: Determine the total cost of the drainage network to be repaired based on the unit length cost and the inspection length.

[0097] In one alternative embodiment, the total repair cost of the drainage network to be repaired is obtained by multiplying the unit length cost of repairing the drainage network, the inspection length, and the adjustment parameters.

[0098] The drainage pipe network cost assessment method provided in this embodiment considers the actual operating conditions of the drainage pipe network to be repaired. It derives a pipe network repair strength coefficient based on the density of misconnections, the complexity of the repair method, and the construction environment penalty factor, which is used to quantify the repair intensity. Furthermore, by using the pipe network repair strength coefficient and the pipe network's age, the repair cost per unit length is calculated, ultimately yielding the total repair cost. This method achieves refined and quantifiable calculation of pipe network repair costs, accurately matches different repair projects, and improves the accuracy of the assessment.

[0099] In some optional implementations, step d2 above includes: weighting and summing the density of misconnection defects, the complexity of the repair method, and the construction environment penalty factor to obtain the network repair strength coefficient of the drainage network to be repaired.

[0100] In an optional embodiment, the pipeline repair strength coefficient It can be calculated using the following relation (11): (10) In the formula, For mixed misconnection defect density, To improve the complexity of the repair method, The construction environment penalty factor, α, β, and γ are weighting coefficients, and their sum is 1.

[0101] The drainage network cost assessment method provided in this embodiment introduces a network repair strength coefficient, which includes factors such as the density of misconnection defects, the complexity of repair methods, and the penalty factors of the construction environment. It comprehensively assesses the network to be repaired, quantifies the repair strength of the drainage network to be repaired, and facilitates subsequent network repair cost assessment.

[0102] In some optional implementations, step d3 above specifically includes: Step d31: Obtain the network age influence factor and benchmark repair cost of the drainage network to be repaired.

[0103] In one optional embodiment, the pipeline age impact factor is used to quantify the impact of pipeline service life on repair costs. For example, the longer the pipeline is used, the more severe the performance degradation and aging losses, and the more material consumption and construction difficulty will increase accordingly during repair.

[0104] In one optional embodiment, the benchmark repair cost is the basic reference value for calculating pipeline repair costs. It refers to the basic cost per unit length of pipeline repair under standard working conditions, i.e., a conventional construction environment without obvious aging or defects.

[0105] Step d32: Calculate the accelerated failure factor of the drainage network to be repaired based on the network age influence factor and the network service life.

[0106] In an optional embodiment, the accelerated failure factor is , The age of the pipeline network is a contributing factor. The service life of the pipeline network.

[0107] Step d33: Multiply the repair strength coefficient, accelerated failure factor and benchmark repair cost of the drainage network to be repaired to obtain the unit length cost of the drainage network to be repaired.

[0108] In an alternative embodiment, the cost per unit length of the drainage network to be repaired is calculated by the following relationship (12): (12) In the formula, Based on the repair cost, For pipeline repair strength coefficient, This is an accelerating failure factor.

[0109] The drainage pipe network cost assessment method provided in this embodiment calculates the unit length repair cost by correlating the repair difficulty, aging degree and basic cost, ensuring that the repair cost assessment is consistent with the actual aging state of the pipe network, and improving the accuracy and reliability of the repair cost assessment.

[0110] This embodiment also provides a drainage network cost assessment device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0111] This embodiment provides a drainage pipe network cost assessment device, such as... Figure 3 As shown, it includes: The data acquisition module 301 is used to acquire geographic data of the area where the drainage pipe network to be built is located.

[0112] The basic parameter calculation module 302 is used to determine the design sewage flow rate and the soil cover depth of the drainage network to be built based on the geographical data of the drainage network to be built.

[0113] The pipe diameter calculation module 303 is used to calculate the pipe diameter of the drainage network to be built based on the design sewage flow rate of the drainage network to be built.

[0114] The unit length cost calculation module 304 is used to calculate the unit length cost of the drainage network to be built based on the pipe diameter and the soil cover depth of the pipe top. The unit length cost is determined by the sum of the pipe material cost and the earthwork excavation cost.

[0115] The cost assessment module 305 is used to determine the total construction cost of the drainage network to be built based on the unit length cost and the length of the pipe segment.

[0116] The drainage network cost assessment device provided in this embodiment of the invention can execute the drainage network cost assessment method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects for executing the method. Further functional descriptions of the various modules and units are the same as in the corresponding embodiments described above, and will not be repeated here.

[0117] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0118] The following is a detailed reference. Figure 4 This diagram illustrates a structural schematic suitable for implementing an electronic device according to embodiments of the present invention. The electronic device may include a processor (e.g., a central processing unit, graphics processor, etc.) 401, which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 402 or a program loaded from memory 408 into random access memory (RAM) 403. The RAM 403 also stores various programs and data required for the operation of the electronic device. The processor 401, ROM 402, and RAM 403 are interconnected via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0119] Typically, the following devices can be connected to I / O interface 405: input devices 406 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 407 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; memory devices 408 including, for example, magnetic tapes, hard disks, etc.; and communication devices 409. Communication device 409 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 4 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown, and more or fewer devices may be implemented or have instead.

[0120] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 409, or installed from a memory 408, or installed from a ROM 402. When the computer program is executed by the processor 401, it performs the functions defined in the drainage network cost assessment method of the embodiments of the present invention.

[0121] Figure 4 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0122] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the drainage network cost assessment method shown in the above embodiments is implemented.

[0123] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0124] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method of sewer network cost assessment, characterized by, The method includes: Obtain geographic data of the area where the drainage pipe network to be built is located; Based on the geographical data of the drainage network to be constructed, determine the design sewage flow rate and the soil cover depth of the drainage network to be constructed. Calculate the pipe diameter of the drainage network to be built based on the design sewage flow rate. The unit length cost of the drainage network to be built is calculated based on the pipe diameter and the soil cover depth of the pipe top. The unit length cost is determined by the sum of pipe material cost, earthwork excavation cost, and cost constant. The total cost of constructing the drainage network is determined based on the unit length cost and the length of the pipe segment.

2. The method according to claim 1, characterized in that, Based on the geographical data of the drainage network to be constructed, the design sewage flow rate of the drainage network to be constructed is determined, including: Obtain population density, service area, average daily flow, and per capita pollution generation from the geographical data of the drainage network to be constructed; Multiply the population density by the service area to obtain the service population; The design sewage flow rate of the drainage network to be built is determined based on the number of people served, the per capita sewage production, and the coefficient of variation of comprehensive domestic sewage volume. The coefficient of variation of comprehensive domestic sewage volume is determined by the average daily flow rate.

3. The method according to claim 1, characterized in that, Based on the geographical data of the drainage pipeline network to be constructed, the design overburden depth of the pipeline network is determined, including: Obtain the minimum soil cover depth and elevation data from the geographical data of the drainage pipe network to be constructed; Based on the elevation data, the terrain elevation difference compensation for the drainage pipe network to be built is calculated; The minimum soil cover depth and the terrain elevation difference compensation are added together to obtain the design soil cover depth of the drainage network to be built.

4. The method according to claim 1, characterized in that, Calculate the pipe diameter of the proposed drainage network based on the design sewage flow rate, including: The pipe diameter of the proposed drainage network is determined using the Manning formula based on the designed sewage flow rate.

5. The method according to claim 1, characterized in that, The unit length cost of the proposed drainage network is calculated based on the pipe diameter and the soil cover depth above the pipe. This unit length cost is determined by the sum of pipe material cost, earthwork excavation cost, and a cost constant, including: Obtain the pipe material cost coefficient, pipe diameter cost nonlinear influence coefficient, earthwork excavation cost coefficient, and cost constant of the drainage network to be constructed; The pipe material cost of the drainage network to be built is determined based on the pipe diameter, the pipe material cost coefficient, and the nonlinear influence coefficient of the pipe diameter cost. The earthwork excavation cost of the drainage pipeline to be constructed is determined based on the soil cover depth, pipe diameter, and earthwork excavation cost coefficient of the pipeline to be constructed. The cost per unit length of the drainage network to be built is obtained by adding the cost of the pipe material, the cost of earthwork excavation, and the cost constant.

6. The method according to claim 1, characterized in that, The method also includes: Obtain the length of the drainage network to be repaired, the service life of the network, the density of misconnections, the complexity of the repair method, and the construction environment penalty factor; The repair strength coefficient of the drainage network to be repaired is calculated based on the density of the misconnection defects, the complexity of the repair method, and the construction environment penalty factor. The unit length cost of the drainage pipe network to be repaired is calculated based on the pipe network repair strength coefficient and the service life of the pipe network. The total cost of the drainage network to be repaired is determined based on the unit length cost and the length of the inspection.

7. The method according to claim 6, characterized in that, Based on the density of misconnected joint defects, the complexity of the repair method, and the construction environment penalty factor, the network repair strength coefficient of the drainage network to be repaired is calculated, including: The repair strength coefficient of the drainage network to be repaired is obtained by weighted summing of the density of the misconnection defects, the complexity of the repair method, and the construction environment penalty factor.

8. The method according to claim 6, characterized in that, Based on the repair strength coefficient of the drainage network to be repaired and the service life of the network, the unit length cost of the drainage network to be repaired is calculated, including: Obtain the network age influencing factor and benchmark repair cost of the drainage network to be repaired; Based on the network age influence factor and the service life of the drainage network to be repaired, calculate the accelerated failure factor of the drainage network to be repaired. The unit length cost of the drainage network to be repaired is obtained by multiplying the network repair strength coefficient, the accelerated failure factor, and the benchmark repair cost.

9. A drainage pipe network cost assessment device, characterized in that, The device includes: The data acquisition module is used to acquire geographic data of the area where the drainage pipe network to be built is located; The basic parameter calculation module is used to determine the design sewage flow rate and the soil cover depth of the drainage network to be built based on the geographical data of the drainage network to be built. The pipe diameter calculation module is used to calculate the pipe diameter of the drainage network to be built based on the design sewage flow rate of the drainage network to be built. The unit length cost calculation module is used to calculate the unit length cost of the drainage network to be built based on the pipe diameter and the soil cover depth of the pipe top. The unit length cost is determined based on the sum of the pipe material cost and the earthwork excavation cost. The cost assessment module is used to determine the total construction cost of the drainage network to be built based on the unit length cost and the length of the pipe segment.

10. An electronic device, characterized in that, include: A memory and a processor are interconnected, the memory storing computer instructions, and the processor executing the computer instructions to perform the drainage network cost assessment method according to any one of claims 1 to 8.

Images