Design method of steel truss girder and corrugated water tank combined aqueduct connecting structure

Abstract

The invention discloses a design method of a steel truss girder and corrugated water tank combined aqueduct connecting structure, and belongs to the technical field of steel structure aqueducts. The overall structure of the steel truss girder and corrugated water tank combined aqueduct connecting structure is designed on the basis of functional requirements, the height design and calculation formula of each stress subsection of the partition plate is established, and design refinement and design efficiency are improved; a stress and rigidity calculation model of the steel truss girder and corrugated groove combined aqueduct connecting structure partition plate is constructed based on an integral structure and a separated stress principle, a design thickness calculation formula of the connecting structure partition plate is provided, and a convenient and rapid steel girder and corrugated groove combined aqueduct connecting structure design method is provided. The influence of the connection structure partition plate construction opening on rigidity calculation is considered, so that the calculation result of the partition plate rigidity calculation model is closer to the real stress state of the structure, and the design reliability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure aqueducts, and in particular to a design method for a steel truss beam and a corrugated water channel combined aqueduct connection structure. Background Art

[0002] Aqueducts are an indispensable part of water conservancy projects. They can effectively cross cross structures and achieve effective regulation of water resources between different regions, playing an irreplaceable role in social development. With the rapid development of the economy and the growth of regional population, the uneven demand for water resources has become increasingly obvious. In this context, steel structure aqueducts are favored by concrete aqueducts due to their significant advantages such as high material strength, light weight, strong spanning capacity, and outstanding terrain adaptability.

[0003] Traditional aqueduct design usually adopts the method of separating the flume from the lower structure (load-bearing structure, foundation, etc.), and realizes the force transmission, stability and functional requirements of the structure through the support connection. The flume mainly undertakes the water transmission function, and the lower structure is mainly responsible for supporting the flume and transferring the load to the foundation. The two are connected by the support. However, with the increase in the demand for water conservancy projects, the span and flow of the aqueduct are getting larger and larger. The traditional aqueduct design adopts a separated structure with a large height and large investment, and its economy is difficult to meet the needs of modern water conservancy projects. By adopting a steel truss beam and a zigzag flume combined structure, the bearing capacity, overall stiffness, stability and economy of the structure can be greatly improved.

[0004] However, as a combined steel structure aqueduct with both stress-bearing and water-transporting functions, its connection structure design and calculation methods are still imperfect in the existing technology. As the main load-bearing structure of the aqueduct, the steel truss beam has a strong bearing capacity. As a water flow channel, the ripple flume can make full use of its ripple folds to increase the longitudinal and lateral stiffness of the structure. Especially under large spans or high water pressure conditions, the ripple structure can effectively release the uncoordinated deformation internal force caused by the temperature difference between the water body and the structure, reduce the impact of temperature changes on the structure, and thus extend the service life. When the two are connected as a whole, the structure of the steel truss beam and the ripple flume usually adopts a fully welded truss beam-arch combination system with outer trusses and inner waves. The connection of this structural system needs to consider the spatial stress characteristics of the vertical bars, diagonal bars and ripple flumes of the steel truss beams, the coordinated deformation capacity, and the stress concentration caused by the fully welded structure, dense nodes and complex connections. Therefore, it is difficult for traditional design and calculation methods to accurately simulate its stress state and deformation characteristics. This greatly restricts the development of combined steel structure aqueducts, and it is urgent to propose a design method for the connection structure of a combined aqueduct with an integral structure and separated stress-bearing steel truss beams and a corrugated flume. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to solve the shortcomings of traditional design methods and propose a design method for a combined aqueduct connection structure of a steel truss beam and a corrugated flume, which can not only realize the structural connection of the steel truss beam and the corrugated flume as a whole, but also ensure that each is independently stressed and does not interfere with each other.

[0006] The present invention solves the above technical problems through the following technical solutions, and the present invention comprises the following steps: Step S1: designing the overall structure of the connection structure of the steel truss beam and the combined aqueduct of the corrugated flume based on functional requirements, wherein the connection structure includes a diaphragm and a T-shaped stiffening rib; Step S2: Construct a force calculation model of the connection structure based on the overall structure and separation force principle to determine the force thickness of the partition Based on the horizontal force balance principle caused by the longitudinal deformation of the corrugated flume due to temperature shrinkage, the design thickness of the T-shaped stiffener is determined. ; Step S3: Assuming that the partition has plastic failure behind the corrugated water tank, and considering the influence of the partition structure opening on the stiffness calculation, the stiffness calculation model of the partition is constructed to determine the stiffness thickness of the partition ; Step S4: Determine the design thickness of the partition based on the force and stiffness calculation model of the partition , and then complete the design of the connection structure.

[0007] Furthermore, in step S1, the connection structure is located between the steel truss beam and the corrugated water tank, with the steel truss beam on the outside serving as a load-bearing structure and the corrugated water tank on the inside serving as a water delivery structure.

[0008] Furthermore, in step S1, the overall structural design process of the connection structure is as follows: Step S11: For the longitudinal design of the connection structure, along the water conveying direction of the aqueduct, based on the principle of overall structure and separated force, taking into account the requirements of load transfer and coordinated deformation, a partition is vertically arranged along the crests and troughs of the wavy flume at intervals of a set times the wavelength of the wavy flume, connecting the outer steel truss beam and the inner wavy flume into a whole; at the same time, between the two partitions, along the longitudinal direction of the wavy flume, a T-shaped stiffening rib is respectively arranged along the crests, troughs and oblique sides of each wave unit of the wavy flume; Step S12: For the lateral design of the connection structure, based on the functional requirement of the power pipeline crossing the bridge, at least one circular hole is set on the upper part of the partition, based on the functional requirement of maintenance and overhaul, a maintenance hole is set on the lower part of the connection structure, and at the same time, considering the load transfer requirements of different water depth conditions, the spatial distribution of each part of the partition is comprehensively determined; Step S13: For the vertical design of the connection structure, a plurality of T-shaped stiffening ribs are respectively arranged along the top and bottom of the corrugated water tank, and the T-shaped stiffening ribs arranged at the top and bottom of the corrugated water tank correspond to each other one by one.

[0009] Furthermore, in step S2, the process of constructing the force calculation model of the partition is as follows: Step S21: Based on the structural stress, assuming that the circular hole, the maintenance hole and the surrounding area of ​​the hole do not participate in the structural stress, the partition is divided into four parts along the height direction, which are defined as the first stress-bearing part, the second stress-bearing part, the third stress-bearing part and the fourth stress-bearing part from top to bottom, wherein the heights of the first stress-bearing part, the second stress-bearing part, the third stress-bearing part and the fourth stress-bearing part are respectively , , and ,and , , and Determine by the following formula: ; ; ; ; in, is the first layer coefficient, is the second layer coefficient, is the third layer coefficient, is the total height of the partition, is the diameter of the circular hole, is the height of the maintenance hole; Step S22: Stress-bearing thickness of the partition Take the maximum value among the four aqueduct structure water transport conditions.

[0010] Furthermore, in step S21, the number of circular holes is two, the first force-bearing part is located above the first circular hole, the second force-bearing part is located between the first circular hole and the second circular hole, the third force-bearing part is located between the second circular hole and the maintenance hole, and the fourth force-bearing part is located below the maintenance hole.

[0011] Furthermore, in step S22, the stress-bearing thickness of the partition in the four aqueduct structure water transport conditions is The calculation method is as follows: Working condition 1: When the water flow height is below the bottom surface of the three force-bearing parts in the aqueduct structure during water transport, assuming that the load on the ripple flume is transmitted by the four force-bearing parts, then: ; in, is the importance coefficient of the aqueduct structure, is the weight of the water body, is the design value of compressive strength of partition steel, is the width of the partition, is the longitudinal spacing of the partitions; Working condition 2: When the water flow height in the aqueduct structure water transport working condition is below the bottom surface of the second force-bearing part and above the bottom surface of the third force-bearing part in the partition, assuming that the load on the ripple flume is transmitted by the third force-bearing part and the fourth force-bearing part, then: ; Working condition 3: When the water flow height in the aqueduct structure water transport working condition is below the bottom surface of the first force-bearing part and above the bottom surface of the second force-bearing part in the partition, assuming that the load on the ripple flume is transmitted by the second force-bearing part, the third force-bearing part, and the fourth force-bearing part, then: ; Working condition 4: When the water flow height is below the top surface of the partition and above the bottom surface of the first force receiving part in the water transport working condition of the aqueduct structure, at this time, the load on the ripple flume is transmitted by the first force receiving part, the second force receiving part, the third force receiving part, and the fourth force receiving part, then: ; in, It is the design value of shear strength of partition steel.

[0012] Furthermore, in step S2, the process of constructing the force calculation model of the T-shaped stiffening rib is as follows: Based on the principle of horizontal force balance caused by the longitudinal deformation of the corrugated flume due to temperature shrinkage, the load caused by the temperature shrinkage of the corrugated flume between two adjacent partitions is borne by the T-shaped stiffening ribs arranged at the bottom of the partition; Then determine the design thickness of the T-shaped stiffener ; ; in, The value of is 2030~2731, is the linear expansion coefficient of the corrugated water tank, is the average temperature gradient of the area where the fluctuating water tank is located, is the elastic modulus of the corrugated flume, is the thickness of the corrugated water tank, is the number of T-shaped stiffening ribs arranged at the bottom of the partition between two adjacent partitions, is the wavelength of the wavy water tank, is the web size of the T-type stiffener, Flange size of T-type stiffener.

[0013] Furthermore, in step S3, the stiffness thickness of the partition Determine by the following formula: ; in, The value of is 0.033~0.047, is the longitudinal spacing of the partitions, is the expanded length of one wavelength of the wave flume, is the elastic modulus of the partition, is the width of the maintenance hole.

[0014] Furthermore, in step S4, the design thickness of the partition is Determine by the following formula: ; Compared with the prior art, the present invention has the following advantages: 1. The present invention designs the overall structure of the steel truss beam and the combined aqueduct connection structure of the undulating flume based on functional requirements, establishes the height design and calculation formula of each force-bearing part of the partition, and improves the refinement and efficiency of the design.

[0015] 2. The present invention constructs a force and stiffness calculation model for the connection structure partition of the combined aqueduct of steel truss beam and corrugated flume based on the principle of overall structure and separated force, provides a design thickness calculation formula for the connection structure partition, and provides a convenient and fast design method for the connection structure of the combined aqueduct of steel beam and corrugated flume.

[0016] 3. The present invention provides a calculation formula for the design thickness of the T-shaped stiffening ribs of the connecting structure based on the horizontal force balance principle caused by the longitudinal deformation of the corrugated water tank caused by temperature shrinkage.

[0017] 4. The present invention takes into account the influence of the openings in the connecting structure partition structure on the stiffness calculation, so that the calculation results of the partition stiffness calculation model are closer to the actual stress state of the structure, thereby improving the reliability of the design.

[0018] 5. The structure has strong integrity. The connecting structure partitions and T-shaped stiffening ribs designed in the present invention take into account the requirements of load transfer and coordinated deformation, which not only reduce the influence of additional stress and secondary stress inside the steel truss beam on the corrugated water tank, but also improve the local stress concentration caused by the fully welded structure of the corrugated water tank, and coordinate the longitudinal deformation of the corrugated water tank caused by temperature shrinkage, thereby improving the bearing capacity, stability and integrity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic flow chart of a design method for a steel beam and corrugated trough combined aqueduct connection structure in an embodiment of the present invention; Figure 2 is a schematic cross-sectional view of an aqueduct structure according to an embodiment of the present invention; Figure 3is a schematic diagram of the longitudinal structure of a connection structure on one side of an embodiment of the present invention (top view); Figure 4 is a diagram of a force calculation model of a partition designed in an embodiment of the present invention; Figure 5 Schematic diagram of the partition structure designed in the embodiment of the present invention; In the figure, 1- partition; 101- force Department (force part); 102-force Part (force-bearing part 2); 103-force-bearing Department (force three parts); 104-force Part (four load-bearing parts); 106-circular hole; 107-maintenance hole; 108-transverse stiffening rib; 2-steel truss beam; 3-corrugated water tank; 4-T-shaped stiffening rib. DETAILED DESCRIPTION

[0020] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0021] Embodiment 1 like Figures 1 to 5 As shown, this embodiment provides a technical solution: a design method for a steel truss beam and a corrugated flume combined aqueduct connection structure, comprising the following steps: Step S1: designing the overall structure of the steel truss beam and the combined aqueduct connection structure of the wavy water channel based on functional requirements; The steps to design the overall structure are: Based on the overall design, the connection structure is located between the steel truss beam 2 and the corrugated water tank 3, with the steel truss beam 2 bearing structure on the outside and the corrugated water tank 3 as a water conveying structure on the inside. The connection structure includes a partition 1 and a T-shaped stiffening rib 4.

[0022] In this embodiment, for the longitudinal design of the connection structure, that is, along the water conveyance direction of the aqueduct, based on the principle of overall structure and separated force, the requirements of load transfer and coordinated deformation are taken into account. First, considering the structural shape of the corrugated water trough 3, for the convenience of installation and connection, a partition 1 is set at intervals of 2 or 3 integer multiples of the wavelength along the crests and troughs of the corrugated water trough 3, and the outer steel truss beam 2 and the inner corrugated water trough 3 are connected as a whole to transfer the load and allow a certain shrinkage and deformation space for the corrugated water trough 3. At the same time, between the two partitions 1, the connection structure is provided with a T-shaped stiffening rib 4 to reduce the influence of the internal additional stress and secondary stress of the steel truss beam 2 on the corrugated water trough 3, and to improve the stress concentration of the fully welded structure. Along the longitudinal direction of the corrugated water trough 3, a T-shaped stiffening rib 4 is arranged along the crest, trough and hypotenuse of the corrugated water trough waveform unit.

[0023] In this embodiment, for the lateral design of the connection structure, based on the functional requirements of the aqueduct structure for the power pipeline to pass through the bridge, 1 to 2 circular holes 106 should be provided on the upper part of the partition 1, and the diameter of the circular hole 106 is d The value is 800mm. Based on the maintenance and overhaul function requirements, a maintenance hole 107 should be set at the bottom of the partition 1. Considering the human body shape, it can be set as a rectangular hole. The height of the maintenance hole 107 is The value is 2550mm. At the same time, considering the load transfer requirements under different water depth conditions, the spatial distribution of each part of the partition 1 is comprehensively determined.

[0024] In this embodiment, for the vertical design of the connecting structure, multiple T-shaped stiffening ribs 4 are arranged along the top and bottom of the corrugated gutter 3, and the T-shaped stiffening ribs 4 arranged at the top and bottom of the corrugated gutter 3 correspond to each other one by one to improve the stress concentration of the fully welded structure.

[0025] The detailed calculation parameters are shown in Table 1.

[0026] Step S2: Based on the principle of overall structure and separation of forces, a force calculation model of the combined aqueduct connection structure of the steel truss beam 2 and the wavy flume 3 is constructed to determine the force thickness of the partition 1 in the connection structure. Based on the horizontal force balance principle caused by the longitudinal deformation of the corrugated water tank 3 caused by temperature shrinkage, the design thickness of the T-shaped stiffener 4 in the connection structure is determined. ; (I) The steps of constructing the force calculation model of the partition 1 are: In this embodiment, based on the structural stress, assuming that the circular hole 106, the maintenance hole 107 and the surrounding area of ​​the hole of the partition 1 do not participate in the structural stress, the partition 1 is divided into four parts along the height direction, which are defined as the stress-bearing parts from top to bottom. Part 101, Force Section 102, Force Section 103 and force Section 104, wherein the force Part 101, Force Section 102, Force Section 103 and force The heights of the parts 104 are , , and ,and , , and Determine as follows: ; ; ; ; in, is the stratification coefficient one, The value is 0.2~0.25 and , is the stratification coefficient two, The value is 0.07~0.14 and , is the stratification coefficient three, The value is 0.04~0.07 and , , is the total height of the ripple tank 2 (that is, the total height of the partition 1), is the diameter of the circular hole 106, is the height of the maintenance hole 107; see Table 1 for specific parameters.

[0027] Strength of the partition 1 in the connection structure Take the maximum value among the following four conditions: (1.1) If Figure 4 As shown, when the water flow height in the aqueduct structure water transport condition is located in the partition 1, the force When the bottom surface of the part 103 is below the bottom surface, it is assumed that the load on the ripple water tank 3 is Section 104 is passed, then: =5.54mm; in, is the importance coefficient of the aqueduct structure, which can be 0.9, 1.0 or 1.1. is the weight of the water body, is the design value of compressive strength of the steel material of partition 1, is the width of the partition 1, is the longitudinal spacing of the partition 1.

[0028] (1.2) If Figure 4 As shown, when the water flow height in the aqueduct structure water transport condition is located in the partition 1, the force Below the bottom surface of part 102, the force When the bottom surface of the part 103 is above the bottom surface, it is assumed that the load on the ripple water tank 3 is Section 103, Force Section 104 is delivered jointly, then: =6.55mm; (1.3) If Figure 4 As shown, when the water flow height in the aqueduct structure water transport condition is located in the partition 1, the force Below the bottom surface of part 101, the force When the bottom surface of the part 102 is above the bottom surface, it is assumed that the load on the ripple water tank 3 is Section 102, Force Section 103, Force Section 104 is delivered jointly, then: =6.81mm; (1.4) If Figure 4 As shown in the figure, when the water flow height in the aqueduct structure water transport condition is below the top surface of the partition 1 and the force When the bottom surface of the part 101 is above the bottom surface, at this time, the load on the wave flume 3 is Part 101, Force Section 102, Force Section 103, Force Section 104 is delivered jointly, then: =15.34mm; in, It is the design value of shear strength of partition 1 steel.

[0029] (II) The steps for constructing the force calculation model of the T-type stiffener 4 and the design thickness calculation of the T-type stiffener are as follows: Based on the horizontal force balance principle caused by the longitudinal deformation of the corrugated water tank 3 caused by temperature contraction, the corrugated water tank 3 between two adjacent partitions 1 (see Figure 3 ) The load caused by temperature shrinkage is borne by the T-shaped stiffening rib 4 arranged at the bottom of the partition; Then determine the design thickness of T-shaped stiffener 4 , determined by the following formula; =10.88mm; Therefore, the design thickness of T-shaped stiffener 4 is Take 12mm.

[0030] in, The value range is 2030~2731. is the linear expansion coefficient of the corrugated water tank 3, is the average temperature gradient of the area where the ripple water tank 3 is located, is the elastic modulus of the corrugated water tank 3, is the thickness of the corrugated water tank 3, is the number of T-shaped stiffening ribs 4 arranged between two adjacent partitions 1 and located at the bottom of the partition 1 (when the longitudinal spacing between two adjacent partitions 1 is twice the wavelength of the corrugated water tank 3, Take 7, when the longitudinal distance between the two partitions 1 is 3 times the wavelength of the folding water tank 3, Take 11), is the wavelength of the wave flume 3, is the web size of T-type stiffener 4, Flange size of T-type stiffener 4.

[0031] Step S3: Assuming that the partition 1 has plastic failure after the ripple water tank 3, and considering the influence of the structural opening of the partition 1 on the stiffness calculation, the stiffness calculation model of the partition 1 is constructed to determine the stiffness thickness of the partition 1 ; Rigidity thickness of partition 1 Determine by the following formula: =14.09mm; in, The value ranges from 0.033 to 0.047. is the longitudinal spacing of the partition 1, is the unfolded length of one wavelength of the wavy flume 3, is the elastic modulus of the partition 1, is the width of the maintenance hole 107; Step S4: Determine the design thickness of the partition 1 based on the force and stiffness calculation model of the partition 1 , and then complete the design of the connection structure; Design thickness of partition 1 Determine by the following formula: =15.34mm; Therefore, the design thickness of the partition 1 in this embodiment is 16mm is acceptable.

[0032] In this embodiment, the detailed calculation parameters involved are shown in Table 1.

[0033] Table 1 Detailed calculation parameters

[0034] In summary, it can be seen from this embodiment that the present invention designs the overall structure of the combined aqueduct connection structure of steel truss beams and corrugated flumes based on functional requirements, establishes the height design and calculation formulas for each force-bearing portion of the partition, and improves the refinement and efficiency of the design; based on the overall structure and separation force principle, a force and stiffness calculation model for the partition in the combined aqueduct connection structure of steel truss beams and corrugated flumes is constructed, a calculation formula for the design thickness of the partition is provided, and a convenient and fast design method for the combined aqueduct connection structure of steel beams and corrugated flumes is provided; based on the horizontal force balance caused by the longitudinal deformation of the corrugated flume caused by temperature contraction The invention adopts the principle of heat treatment and provides a calculation formula for the design thickness of T-shaped stiffening ribs. The invention takes into account the influence of the openings in the partition structure on the stiffness calculation, so that the calculation results of the partition stiffness calculation model are closer to the actual stress state of the structure, thereby improving the reliability of the design. The structure has strong integrity. The partitions and T-shaped stiffening ribs designed in the invention take into account the requirements of load transfer and coordinated deformation, which not only reduce the influence of the additional stress and secondary stress inside the steel truss beam on the corrugated water tank, but also improve the local stress concentration caused by the fully welded structure of the corrugated water tank, and coordinate the longitudinal deformation of the corrugated water tank caused by temperature shrinkage, thereby improving the bearing capacity, stability and integrity of the structure.

[0035] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A design method for a steel truss beam and a corrugated flume combined aqueduct connection structure, characterized in that: The following steps are involved: Step S1: designing the overall structure of the connection structure of the steel truss beam and the combined aqueduct of the corrugated flume based on functional requirements, wherein the connection structure includes a diaphragm and a T-shaped stiffening rib; Step S2: Construct a force calculation model of the connection structure based on the overall structure and separation force principle to determine the force thickness of the partition Based on the horizontal force balance principle caused by the longitudinal deformation of the corrugated flume due to temperature shrinkage, the design thickness of the T-shaped stiffener is determined. ; Step S3: Assuming that the partition has plastic failure behind the corrugated water tank, and considering the influence of the partition structure opening on the stiffness calculation, the stiffness calculation model of the partition is constructed to determine the stiffness thickness of the partition ; Step S4: Determine the design thickness of the partition based on the force and stiffness calculation model of the partition , and then complete the design of the connection structure.

2. The design method of a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 1, characterized in that: In step S1, the connection structure is located between the steel truss beam and the corrugated water tank, with the steel truss beam on the outside serving as a load-bearing structure and the corrugated water tank on the inside serving as a water delivery structure.

3. The design method of a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 1, characterized in that: In step S1, the overall structural design process of the connection structure is as follows: Step S11: For the longitudinal design of the connection structure, along the water conveying direction of the aqueduct, based on the principle of overall structure and separated force, taking into account the requirements of load transfer and coordinated deformation, a partition is vertically arranged along the crests and troughs of the wavy flume at intervals of a set times the wavelength of the wavy flume, connecting the outer steel truss beam and the inner wavy flume into a whole; at the same time, between the two partitions, along the longitudinal direction of the wavy flume, a T-shaped stiffening rib is respectively arranged along the crests, troughs and oblique sides of each wave unit of the wavy flume; Step S12: For the lateral design of the connection structure, based on the functional requirement of the power pipeline crossing the bridge, at least one circular hole is set on the upper part of the partition, based on the functional requirement of maintenance and overhaul, a maintenance hole is set on the lower part of the connection structure, and at the same time, considering the load transfer requirements of different water depth conditions, the spatial distribution of each part of the partition is comprehensively determined; Step S13: For the vertical design of the connection structure, a plurality of T-shaped stiffening ribs are respectively arranged along the top and bottom of the corrugated water tank, and the T-shaped stiffening ribs arranged at the top and bottom of the corrugated water tank correspond to each other one by one.

4. The design method of a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 3, characterized in that: In step S2, the process of constructing the force calculation model of the partition is as follows: Step S21: Based on the structural stress, assuming that the circular hole, the maintenance hole and the surrounding area of ​​the hole do not participate in the structural stress, the partition is divided into four parts along the height direction, which are defined as the first stress-bearing part, the second stress-bearing part, the third stress-bearing part and the fourth stress-bearing part from top to bottom, wherein the heights of the first stress-bearing part, the second stress-bearing part, the third stress-bearing part and the fourth stress-bearing part are respectively , , and ,and , , and Determine as follows: ； ； ； ； in, is the first layer coefficient, is the second layer coefficient, is the third layer coefficient, is the total height of the partition, is the diameter of the circular hole, is the height of the maintenance hole; Step S22: Stress-bearing thickness of the partition Take the maximum value among the four aqueduct structure water transport conditions.

5. The method for designing a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 4, characterized in that: In step S21, there are two circular holes, the first force-bearing part is located above the first circular hole, the second force-bearing part is located between the first circular hole and the second circular hole, the third force-bearing part is located between the second circular hole and the maintenance hole, and the fourth force-bearing part is located below the maintenance hole.

6. The design method of a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 5, characterized in that: In step S22, the stress-bearing thickness of the partition in the four aqueduct structure water transport conditions is The calculation method is as follows: Working condition 1: When the water flow height is below the bottom surface of the three force-bearing parts in the aqueduct structure during water transport, assuming that the load on the ripple flume is transmitted by the four force-bearing parts, then: ； in, is the importance coefficient of the aqueduct structure, is the weight of the water body, is the design value of compressive strength of partition steel, is the width of the partition, is the longitudinal spacing of the partitions; Working condition 2: When the water flow height in the aqueduct structure water transport working condition is below the bottom surface of the second force-bearing part and above the bottom surface of the third force-bearing part in the partition, assuming that the load on the ripple flume is transmitted by the third force-bearing part and the fourth force-bearing part, then: ； Working condition 3: When the water flow height in the aqueduct structure water transport working condition is below the bottom surface of the first force-bearing part and above the bottom surface of the second force-bearing part in the partition, assuming that the load on the ripple flume is transmitted by the second force-bearing part, the third force-bearing part, and the fourth force-bearing part, then: ； Working condition 4: When the water flow height is below the top surface of the partition and above the bottom surface of the first force receiving part in the water transport working condition of the aqueduct structure, at this time, the load on the ripple flume is transmitted by the first force receiving part, the second force receiving part, the third force receiving part, and the fourth force receiving part, then: ; in, It is the design value of shear strength of partition steel.

7. The method for designing a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 6, characterized in that: In step S2, the process of constructing the force calculation model of the T-shaped stiffener is as follows: Based on the principle of horizontal force balance caused by the longitudinal deformation of the corrugated flume due to temperature shrinkage, the load caused by the temperature shrinkage of the corrugated flume between two adjacent partitions is borne by the T-shaped stiffening ribs arranged at the bottom of the partition; Then determine the design thickness of the T-shaped stiffener ; ； in, The value of is 2030~2731, is the linear expansion coefficient of the corrugated water tank, is the average temperature gradient of the area where the flume flume is located, is the elastic modulus of the corrugated flume, is the thickness of the corrugated water tank, is the number of T-shaped stiffening ribs arranged at the bottom of the partition between two adjacent partitions, is the wavelength of the wavy water tank, is the web size of the T-type stiffener, Flange size of T-type stiffener.

8. The method for designing a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 7, characterized in that: In step S3, the stiffness thickness of the partition Determine as follows: ； in, The value of is 0.033~0.047, is the longitudinal spacing of the partitions, is the expanded length of one wavelength of the wave flume, is the elastic modulus of the partition, is the width of the maintenance hole.

9. The method for designing a steel truss beam and corrugated flume combined aqueduct connection structure according to claim 8, characterized in that: In step S4, the design thickness of the partition is Determine as follows: 。

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