Horizontal beam type grating dam design optimization method, system, device and program product
By dividing the horizontal beam grid dam into different zones and calculating the maximum debris flow pressure in each zone, the problem of not considering the flow state in the existing design was solved, resulting in more accurate calculations and a longer service life of the beams.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA RAILWAY ERYUAN ENGINEERING GROUP CO LTD
- Filing Date
- 2026-03-20
- Publication Date
- 2026-05-15
AI Technical Summary
The existing horizontal beam grid dam design does not consider the impact of debris flow on the beam grid structure, resulting in distorted design and reduced service life of the beam structure.
Based on the debris flow flow-blockage state, the horizontal beam grid dam is divided into bottom, middle and top beam regions along the dam height. The maximum debris flow impact pressure in each region is calculated separately. Considering the debris flow movement state and dam structure characteristics, a phased calculation method is established.
It improved the accuracy of calculating the maximum impact pressure of debris flows, enhanced the realism of design schemes, extended the service life of beam structures, and reduced engineering costs.
Smart Images
Figure CN122046503A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engineering design, and in particular to a design optimization method, system, device, and program product for horizontal beam grid dams. Background Technology
[0002] In debris flow control, horizontal beam grid dams possess functions similar to solid dams, while also offering unique advantages in sediment regulation. They reduce downstream scouring capacity, intercept coarse sediment upstream and discharge fine sediment upstream, altering the composition of upstream deposits. This dual function of interception and discharge extends their service life under the same reservoir capacity (dam height). Furthermore, horizontal beam grid dams are structurally lightweight and easy to assemble, experience minimal disturbance during construction, and exhibit high stability, aligning with the principles and concepts of ecological management and demonstrating promising development and application prospects.
[0003] Traditional horizontal beam grid dam design schemes, when used in debris flow control projects such as debris flow traps, assume that the impact load of debris flow on the horizontal beam grid dam is only related to the properties of the debris flow itself, without considering the influence of the horizontal beam grid structure on the flow state of the debris flow. The flow and blockage process of debris flow at the horizontal beam grid dam affects the flow rate and thus the impact force on the beams, which deviates significantly from reality. In fact, under the influence of the debris flow flow state, the flow locations of the horizontal beam grid dam beams are often the critical points for impact failure. Existing methods for calculating impact pressure are not precise enough and fail to consider the influence of the horizontal beam grid structure on the flow state of the debris flow, leading to distorted design schemes and significantly reducing the service life of the horizontal beam grid dam beam structure. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of existing technologies in the design of horizontal beam grid dams, which do not consider the influence of the horizontal beam grid structure on the flow state of debris flow, and to provide a design optimization method, system, device and program product for horizontal beam grid dams.
[0005] In a first aspect, the present invention provides a design optimization method for horizontal beam grid dams, which includes at least two steps: regional division and calculation of the maximum impact pressure of debris flow in each region.
[0006] Regional Division: Based on the debris flow flow-blockage state, the horizontal beam grid dam is divided into a bottom beam region, a middle beam region, and a top beam region along the dam height. Calculation of Maximum Debris Flow Pressure for Each Region: The maximum debris flow pressure is calculated for the bottom beam region based on the debris flow movement characteristics; for the middle beam region, the maximum debris flow pressure is calculated based on the debris flow movement characteristics and the structural features of the horizontal beam grid dam; and for the top beam region, the maximum debris flow pressure is calculated based on the backwater height caused by beam blockage.
[0007] According to a preferred embodiment, the region division includes: obtaining the specific gravity of debris flow, the characteristic particle size of debris flow soil, the width of the gully at the proposed dam site, the longitudinal gradient of the original gully at the proposed dam site, and the relative viscosity of debris flow.
[0008] According to a preferred embodiment, the area division further includes: obtaining the initial debris flow velocity and mud depth at the proposed dam site based on a preset debris flow occurrence probability; calculating a dimensionless Frode number reflecting the motion properties of the debris flow based on the initial debris flow velocity, mud depth, and gravitational acceleration at the proposed dam site; and calculating the debris flow run-up value based on the Frode number and mud depth.
[0009] According to a preferred embodiment, the region division further includes:
[0010] Obtain the structural parameters of the proposed horizontal beam-type grid dam, including at least: dam height, vertical thickness of the crossbeams, and net spacing between the crossbeams. Calculate the relative opening width of the proposed horizontal beam-type grid dam based on the structural parameters.
[0011] The area of the proposed horizontal beam grid dam within the specified mud depth range is designated as the bottom beam area. The area of the proposed horizontal beam grid dam within the debris flow runoff range is designated as the middle beam area. The area of the proposed horizontal beam grid dam above the debris flow runoff range is designated as the top beam area.
[0012] According to a preferred embodiment, the calculation of the maximum debris flow impact pressure in the bottom crossbeam region based on the debris flow motion characteristics includes: calculating the maximum debris flow impact pressure based on the debris flow unit weight, the gravitational acceleration at the proposed dam site, the Frod number, the flow velocity, and the mud depth.
[0013] According to a preferred embodiment, the calculation of the maximum debris flow impact pressure in the central crossbeam region based on the debris flow movement characteristics and the structural features of the horizontal beam grid dam includes: calculating the maximum debris flow impact pressure based on the debris flow unit weight, the debris flow characteristic particle size, the gravitational acceleration at the proposed dam site, the Frod number, the flow velocity, the mud depth, and the net spacing between the crossbeams.
[0014] According to a preferred embodiment, the calculation of the maximum sluice pressure of debris flow in the top crossbeam region based on the backwater height of the crossbeam blockage includes: calculating the maximum sluice pressure of debris flow based on the specific gravity of the debris flow, the characteristic particle size of the debris flow, the gravitational acceleration at the proposed dam site, the Frod number, the flow velocity, the mud depth, the net spacing of the crossbeams, the relative viscosity of the debris flow, the channel width at the proposed dam site, the longitudinal gradient of the original channel at the proposed dam site, and the specific gravity of solid matter and water in the debris flow.
[0015] In a second aspect, the present invention also provides a design optimization system for horizontal beam grid dams, comprising: a region division unit and a debris flow maximum impact pressure calculation unit.
[0016] The regional division unit divides the horizontal beam grid dam along its height into a bottom beam region, a middle beam region, and a top beam region based on the debris flow flow-blockage state. The maximum debris flow slug pressure calculation unit calculates the maximum debris flow slug pressure for the bottom beam region based on the debris flow movement characteristics; for the middle beam region, it calculates the maximum debris flow slug pressure based on the debris flow movement characteristics and the structural features of the horizontal beam grid dam; and for the top beam region, it calculates the maximum debris flow slug pressure based on the backwater height caused by beam blockage.
[0017] In a third aspect, the present invention also provides an electronic device. The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the horizontal beam grid dam design optimization method provided by the present invention.
[0018] In a fourth aspect, the present invention also provides a computer program product comprising instructions for performing the horizontal beam grid dam design optimization method as provided by the present invention.
[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a design optimization method for horizontal beam-type grid dams. Based on the debris flow-blockage state, the horizontal beam-type grid dam is divided along its height into a bottom beam region, a middle beam region, and a top beam region. Furthermore, based on the interaction between the debris flow and the horizontal beam-type grid dam in different regions under debris flow impact, and the characteristics of the maximum debris flow impact pressure under the influence of the flow process, a staged calculation method considering the debris flow motion state and dam structural characteristics is established. This improves the accuracy of the maximum debris flow impact pressure calculation results, thereby enhancing the realism of the horizontal beam-type grid dam design scheme and increasing the service life of the actual horizontal beam-type grid dam beam structure. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a horizontal beam-type grid dam for debris flow.
[0021] Figure 2 This is a schematic diagram of the process for dividing the region in Example 2.
[0022] Figure 3 This is a schematic diagram illustrating the regional division of the horizontal beam-type grid dam for debris flow according to the present invention.
[0023] Figure 4This is a schematic diagram of the functional units of the horizontal beam grid dam design optimization system in Example 3. Detailed Implementation
[0024] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0025] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.
[0026] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.
[0027] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0028] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.
[0029] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0030] When designing sediment trap dams, especially horizontal beam grid dams, the inventors discovered that existing design methods lacked consideration of the debris flow flow-blockage state and the structural characteristics of the crossbeams. Through research, the inventors gained a thorough understanding of the distribution law of the impact pressure during the impact of debris flow on horizontal beam grid dams. This avoids the increased engineering costs caused by using a uniform design for different crossbeams in horizontal beam grid dams. Based on this, the inventors proposed a refined method for determining the maximum impact pressure Pmax of debris flow that considers longitudinal distribution differences. This method is used to optimize the design scheme of horizontal beam grid dams, improves the realism of the design scheme, reduces the engineering cost of horizontal beam grid dams, and increases the service life of the actual horizontal beam grid dam crossbeam structure.
[0031] The structure of a horizontal beam grid dam is as follows: Figure 1 As shown, a horizontal beam grid dam is a type of retaining structure specifically designed for debris flow prevention. It belongs to the category of "permeable" silt dams, and its core design concept is "combined interception and drainage," meaning it intercepts large rocks and solid materials in debris flows while allowing water and fine particles to pass through.
[0032] Horizontal beam grid dams are commonly used in gully control projects in areas prone to debris flows. They mainly consist of horizontally arranged beams (beam bodies) and supports (or concrete sidewalls) on both sides. The beams are typically made of precast reinforced concrete beams, steel rails, or I-beams, arranged horizontally in parallel. The spacing (clear distance) between the beams is designed based on the maximum particle size of the debris flow to be intercepted. The supports / sidewalls are located on both sides of the gully to support the ends of the horizontal beams and are anchored into the mountainside to ensure stability.
[0033] Example 1 To address the problem that existing design methods for horizontal beam grid dams do not consider the influence of the horizontal beam grid structure on the flow state of debris flows, and only assume that the impact load of debris flows on the horizontal beam grid dam is only related to the properties of the debris flows themselves, resulting in distorted design schemes and significantly reduced service life of the horizontal beam grid dam's crossbeam structure, this implementation provides a design optimization method for horizontal beam grid dams.
[0034] This implementation provides a design optimization method for horizontal beam grid dams, which may include two steps: regional division and calculation of the maximum impact pressure of debris flow in each region.
[0035] Regional Division: Based on the debris flow flow-blockage state, the horizontal beam grid dam is divided into three regions along its height: the bottom beam region, the middle beam region, and the top beam region. Calculation of Maximum Debris Flow Pressure for Each Region: The maximum debris flow pressure is calculated for the bottom beam region based on the debris flow movement characteristics; for the middle beam region, the maximum debris flow pressure is calculated based on the debris flow movement characteristics and the structural features of the horizontal beam grid dam; and for the top beam region, the maximum debris flow pressure is calculated based on the backwater height caused by beam blockage.
[0036] The horizontal beam grid dam design optimization method provided in this embodiment divides the horizontal beam grid dam along the dam height into a bottom beam region, a middle beam region, and a top beam region based on the debris flow flow-blockage state. Furthermore, based on the interaction between the debris flow and the horizontal beam grid dam in different regions under debris flow impact, and the characteristics of the maximum debris flow impact pressure under the influence of the flow process, a staged calculation method considering the debris flow movement state and dam structural characteristics is established. This improves the accuracy of the maximum debris flow impact pressure calculation results, thereby enhancing the realism of the horizontal beam grid dam design scheme and increasing the service life of the actual horizontal beam grid dam beam structure.
[0037] Example 2 This embodiment is a further improvement on embodiment 1, and the repeated content will not be described again.
[0038] See Figure 2 Preferably, the regional division includes: S1. Obtain the specific gravity γ of debris flow, the characteristic particle size d95 of debris flow soil, the width W of the gully at the proposed dam site, the longitudinal slope I of the original gully at the proposed dam site, and the relative viscosity μ of debris flow.
[0039] S21. Obtain the initial debris flow velocity v and mud depth h at the proposed dam site based on the preset debris flow occurrence probability; S22. Calculate the dimensionless Froude number Fr, which reflects the motion characteristics of the debris flow, based on the initial debris flow velocity v, the debris depth, and the gravitational acceleration g at the proposed dam site. S23. Calculate the debris flow runoff height Δh based on the Frod number Fr and the mud depth h.
[0040] S3. Obtain the structural parameters of the proposed horizontal beam grid dam, including at least: dam height H, vertical thickness of the beams, and net spacing b between the beams; and calculate the relative opening width δh / d95 of the proposed horizontal beam grid dam based on the structural parameters.
[0041] S4. Based on the mud depth h, debris flow run-up value Δh, and dam height H, the proposed horizontal beam grid dam is divided into the bottom beam region, the middle beam region, and the top beam region.
[0042] See Figure 3 The area of the proposed horizontal beam grid dam within the mud depth range is designated as the bottom crossbeam area. The area of the proposed horizontal beam grid dam within the debris flow run-up range is designated as the middle crossbeam area. The area of the proposed horizontal beam grid dam above the debris flow run-up range is designated as the top crossbeam area.
[0043] Preferably, the maximum impact pressure of the debris flow is calculated for the bottom crossbeam area based on the movement characteristics of the debris flow, including: calculating the maximum impact pressure of the debris flow based on the specific gravity of the debris flow, the gravitational acceleration at the proposed dam site, the Frod number, the flow velocity, and the mud depth.
[0044] For the bottom crossbeam region (within the range of incoming mud depth h), the debris flow directly impacts the crossbeam upon contact. The maximum impact pressure is mainly affected by the Frod number Fr of the incoming debris flow. Based on the research results, a method for calculating the maximum impact pressure Pmax (unit kPa) of the debris flow is established: [0, h ) In the formula, γ is the unit weight of debris flow (kN / m³). 3 The value was determined through field investigations and experiments; g is the acceleration due to gravity (m / s²). 2 ); Fr The Froude number is a dimensionless number that reflects the movement characteristics of debris flows. ; v and h The initial average debris flow velocity and mud depth at the cross-section where the proposed or existing horizontal beam grid dam is located.
[0045] Preferably, the maximum impact pressure of debris flow is calculated for the central crossbeam region based on the movement characteristics of debris flow and the structural characteristics of horizontal beam grid dam, including: calculating the maximum impact pressure of debris flow based on the specific gravity of debris flow, characteristic particle size of debris flow, gravitational acceleration at the proposed dam site, Frod number, flow velocity, mud depth and net spacing of crossbeams.
[0046] For the central crossbeam area (the debris flow run-up influence zone), after the debris flow impacts and contacts the horizontal beam grid dam, due to the presence of the crossbeams, the debris flow subsequently experiences overflow and run-up. At this time, the influencing factor of the impact pressure coefficient K is the Froude number, which characterizes the relative magnitudes of inertial force and gravity. Fr And the relative opening width characterizing the flow effect of debris flow at a horizontal beam grid dam. δh / d 95 Based on the research results, a method for calculating the maximum impact force Pmax of debris flows is established to account for the impact of debris flows: [ h , h +Δ h ) In the formula, b is the net spacing between the beams (m), see Figure 1 , for engineering design parameters; d 95 Δh is the characteristic particle size of debris flow (m), determined based on field investigation; Δh is the runoff height (m), determined according to formula Δh. h =0.72 Fr 1.85 h 0.92 Calculate; other parameters are the same as above.
[0047] Preferably, the calculation of the maximum sluice pressure of debris flow in the top crossbeam area based on the backwater height of the crossbeam blockage includes: calculating the maximum sluice pressure of debris flow based on the specific gravity of debris flow, characteristic particle size of debris flow, gravitational acceleration at the proposed dam site, Frod number, flow velocity, mud depth, net spacing of crossbeams, relative viscosity of debris flow, channel width at the proposed dam site, longitudinal gradient of the original channel at the proposed dam site, and specific gravity of solid matter and water in the debris flow.
[0048] For the top crossbeam area (the backwater heap area outside the debris flow runoff influence zone), during the impact of debris flow and horizontal beam grid dam, the backwater heap is blocked by the crossbeam. Based on the research results, a method for calculating the maximum debris flow impact force Pmax is established:
[0049] In the formula, μ is the relative viscosity of debris flow, determined based on field surveys and indoor tests, in Pa·s; W is the width of the gully at the dam site, in meters. The longitudinal gradient of the original gully at the dam site; The parameter characterizing the degree of blockage in the crossbeam is derived from... Sure, , These are the unit weights of solid materials and water in the debris flow, respectively, in kN / m³. 3 Determined based on basic data. =26.5kN / m 3 , =10kN / m 3 Other parameters are the same as above.
[0050] This embodiment addresses the shortcomings of existing debris flow disaster prevention engineering design schemes, which lack sufficient precision in calculating shovel pressure and fail to consider dam structural characteristics. Based on existing design specifications and extensive field test data, a method for calculating shovel pressure under actual working conditions involving the interaction between debris flow and horizontal beam-type grid dams was created through experimental data fitting. This method, based on measurement and scientific theoretical calculations, creatively establishes a shovel pressure calculation method that considers both the properties of the debris flow itself and its flow-blockage state, as well as the structural characteristics of the dam. This provides a strong scientific basis for future calculations of the maximum shovel pressure exerted by debris flow on the crossbeams of horizontal beam-type grid dams.
[0051] Compared with existing design methods, this invention fully considers the interaction between debris flow and horizontal beam grid dam, as well as the characteristics of maximum debris flow shovel pressure under the influence of the flow process when calculating the maximum shovel pressure. It abandons the method of uniformly adopting the solid dam under debris flow shovel pressure in the standard, and creatively establishes a staged calculation method that considers the debris flow movement state and dam structure characteristics. This makes the accuracy of the maximum debris flow shovel pressure calculation results far exceed the calculation results of the current standard, and has strong practicality.
[0052] The following description, using specific examples, illustrates the provisions of this embodiment. A debris flow gully has a drainage area of approximately 54.9 km². 2 The main gully is 16.96 km long, with a steep channel and a relative elevation difference of up to 3956 m. The gully is severely incised, forming a typical "V"-shaped valley. Furthermore, the area experiences concentrated rainfall and abundant debris flow, which is conducive to debris flows. Statistics show that this debris flow gully experiences 1-2 debris flows annually, seriously threatening the smooth flow of major roads at the gully's mouth and the safety of local residents' property. It is proposed to construct a horizontal beam-type grid dam in the debris flow zone of this gully, with a design standard of P=5% (20-year return period). The maximum impact pressure of debris flows on the beams needs to be considered in the structural design of the project.
[0053] Step 1: Through on-site investigation, the severity of the debris flow in the gully was measured. γ 17 kN / m 3 Characteristic particle size of debris flow soil d 95 The width of the ditch at the proposed dam site is 20m (W), with a longitudinal gradient of 0.8m. I The relative viscosity of the debris flow was determined to be 132‰ based on field surveys and indoor tests, with a relative viscosity μ of 0.066 Pa·s.
[0054] Step 2: Initial debris flow velocity at the dam site of the horizontal beam grid dam when P=5% (20-year return period). v =4.77 m / s, mud depth h =2.1 m, calculate the dimensionless Froude number, which reflects the motion state of the debris flow. Then calculate the rise Δ h =0.72 Fr 1.85 h 0.92 =0.72×1.05^1.85×2.1^0.92=1.56 m.
[0055] Step 3: Based on the engineering structural design data, determine the proposed horizontal beam grid dam height to be 6.5 m, the vertical thickness of the horizontal beams to be 0.3 m, and the net spacing between the horizontal beams. b Given a value of 0.6 m, calculate the relative opening width. b / d 95 , b / d 95 =0.75 Step 4: According to the design data of the horizontal beam grid dam, the dam body is designed with 7 crossbeams, numbered 1# to 7# from bottom to top. Therefore, calculate the maximum debris flow impact pressure Pmax in the bottom crossbeam area (crossbeams 1# and 2#) within the range of the incoming mud depth h. Pmax=5.278×(17 / 9.8)×4.77^2=208.32 kPa Step 5: For the central crossbeam area (crossbeams #3 and #4) of the debris flow runoff influence zone, calculate the maximum debris flow impact force Pmax. Pmax=4.504×(0.6 / 0.8)^0.12×1.05^(-0.817)×(17 / 9.8)×4.77^2=165.03kPa Step Six: For the top beam area (beams #5, #6, and #7) of the backwater embankment outside the debris flow runoff influence zone, calculate the maximum debris flow impact force Pmax. Pmax=1.1×(0.6 / 0.8)^0.12×(17 / 9.8)×74.32×2.27×0.053=68.05 kPa The maximum debris flow pressure Pmax in the bottom crossbeam area (crossbeams #1 and #2) of the horizontal beam grid dam is 208.32 kPa; the maximum debris flow pressure Pmax in the middle crossbeam area (crossbeams #3 and #4) is 165.03 kPa; and the maximum debris flow pressure Pmax in the top crossbeam area (crossbeams #5, #6, and #7) is 68.05 kPa.
[0056] If we adopt the traditional design approach that assumes the impact load of debris flow on a horizontal beam grid dam is solely related to the properties of the debris flow itself, and use a uniform design for all crossbeams of the horizontal beam grid dam, then all crossbeams of the horizontal beam grid dam would need to withstand the maximum debris flow impact pressure of 208.32 kPa, inevitably leading to increased engineering costs. By using this embodiment to calculate the maximum debris flow pressure in each region of the horizontal beam grid dam, designers can use the maximum debris flow pressure in each region as the design expectation to optimize the design scheme. This not only makes the design scheme of the horizontal beam grid dam more realistic, but also reduces the engineering cost of the horizontal beam grid dam and increases the service life of the actual horizontal beam grid dam beam structure.
[0057] Example 3 This embodiment provides a design optimization system for horizontal beam-type grid dams. See also... Figure 4 The horizontal beam grid dam design optimization system includes: input unit, output unit, region division unit, and debris flow maximum impact pressure calculation unit.
[0058] The input unit is used to input parameters such as the unit weight of debris flow, characteristic particle size of debris flow soil, width of the channel at the proposed dam site, longitudinal gradient of the original channel at the proposed dam site, relative viscosity of debris flow, flow velocity and mud depth, and structural parameters of the horizontal beam grid dam.
[0059] The regional division unit is based on the debris flow-blockage state, dividing the horizontal beam grid dam along the dam height into the bottom beam region, the middle beam region, and the top beam region.
[0060] The maximum slug pressure calculation unit for debris flow calculates the maximum slug pressure for the bottom crossbeam region based on the debris flow movement characteristics; for the middle crossbeam region, it calculates the maximum slug pressure based on the debris flow movement characteristics and the structural characteristics of the horizontal beam grid dam; and for the top crossbeam region, it calculates the maximum slug pressure based on the backwater height caused by the crossbeam blockage.
[0061] The output unit outputs the regional division results along the horizontal beam grid dam and the maximum debris flow impact pressure in each region.
[0062] Preferably, the horizontal beam grid dam design optimization system provided in this embodiment can be used to implement the horizontal beam grid dam design optimization method involved in Embodiment 1 or Embodiment 2.
[0063] Example 4 This embodiment provides an electronic device. The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the horizontal beam grid dam design optimization method involved in Embodiment 1 or Embodiment 2.
[0064] Example 5 This embodiment provides a computer program product containing instructions for executing the horizontal beam grid dam design optimization method as described in Embodiment 1 or Embodiment 2.
[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A design optimization method for horizontal beam-type grid dams, characterized in that, At least including: Regional division: Based on the debris flow-blockage state, the horizontal beam grid dam is divided into the bottom beam region, the middle beam region, and the top beam region along the dam height. Calculation of maximum impact force of debris flow in different regions: The maximum impact force of the debris flow is calculated for the bottom crossbeam area based on the characteristics of debris flow movement; The maximum impact force of the debris flow in the central crossbeam region is calculated based on the movement characteristics of the debris flow and the structural features of the horizontal beam grid dam. The maximum impact pressure of debris flow is calculated for the top beam area based on the backwater level caused by the beam blockage.
2. The design optimization method for a horizontal beam grid dam according to claim 1, characterized in that, The regional division includes: Obtain the specific gravity of debris flow, characteristic particle size of debris flow soil, width of gully at the proposed dam site, longitudinal gradient of the original gully at the proposed dam site, and relative viscosity of debris flow.
3. The design optimization method for a horizontal beam grid dam according to claim 2, characterized in that, The regional division also includes: The initial debris flow velocity and mud depth at the proposed dam site are obtained based on the preset debris flow occurrence probability. The dimensionless Frode number, which reflects the motion properties of the debris flow, is calculated based on the initial debris flow velocity, mud depth, and gravitational acceleration at the proposed dam site. The runoff elevation is calculated based on the Frod number and mud depth.
4. The design optimization method for a horizontal beam grid dam according to claim 3, characterized in that, The regional division also includes: Obtain the structural parameters of the proposed horizontal beam grid dam, including at least: dam height, vertical thickness of the beams, and net spacing between beams; calculate the relative opening width of the proposed horizontal beam grid dam based on the structural parameters; The area of the proposed horizontal beam grid dam located within the mud depth range is divided into the bottom horizontal beam area; The area of the proposed horizontal beam grid dam located within the debris flow run-up range is divided into the central horizontal beam area; The area above the debris flow runoff range of the proposed horizontal beam grid dam is designated as the top beam area.
5. The design optimization method for a horizontal beam grid dam according to claim 4, characterized in that, The calculation of the maximum impact force of the debris flow in the bottom crossbeam area based on the debris flow movement characteristics includes: The maximum impact force of the debris flow is calculated based on the specific gravity of the debris flow, the gravitational acceleration at the proposed dam site, the Frod number, the flow velocity, and the mud depth.
6. The design optimization method for a horizontal beam grid dam according to claim 4, characterized in that, The calculation of the maximum impact force of debris flow in the central crossbeam region based on the movement characteristics of debris flow and the structural characteristics of the horizontal beam grid dam includes: The maximum impact force of the debris flow is calculated based on the specific gravity of the debris flow, the characteristic particle size of the debris flow, the gravitational acceleration at the proposed dam site, the Frod number, the flow velocity, the mud depth, and the net spacing between the crossbeams.
7. The design optimization method for a horizontal beam grid dam according to claim 4, characterized in that, The calculation of the maximum impact force of debris flow in the top beam area based on the backwater level caused by the beam blockage includes: The maximum impact pressure of the debris flow is calculated based on the specific gravity of the debris flow, the characteristic particle size of the debris flow, the gravitational acceleration at the proposed dam site, the Frod number, the flow velocity, the mud depth, the net spacing between the crossbeams, the relative viscosity of the debris flow, the channel width at the proposed dam site, the longitudinal gradient of the original channel at the proposed dam site, the specific gravity of the solid material in the debris flow, and the specific gravity of water.
8. A design optimization system for horizontal beam-type grid dams, characterized in that, include: The regional division unit is based on the debris flow-blockage state, dividing the horizontal beam grid dam along the dam height into the bottom beam region, the middle beam region, and the top beam region. Unit for calculating maximum impact force of debris flow The maximum impact force of the debris flow is calculated for the bottom crossbeam area based on the characteristics of debris flow movement; The maximum impact force of the debris flow in the central crossbeam region is calculated based on the movement characteristics of the debris flow and the structural features of the horizontal beam grid dam. The maximum impact pressure of debris flow is calculated for the top beam area based on the backwater level caused by the beam blockage.
9. An electronic device, characterized in that, The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the horizontal beam grid dam design optimization method according to any one of claims 1 to 7.
10. A computer program product, characterized in that, It includes instructions for performing the horizontal beam grid dam design optimization method as described in any one of claims 1-7.