Water conservancy project steel structure barrier floating box

Abstract

The utility model discloses a water conservancy project steel structure floating blocking box which comprises gate piers arranged on the two sides of a river and a steel structure floating blocking box body arranged between the gate piers on the two sides and used for blocking floating objects. The steel structure floating blocking box comprises a front floating blocking panel, a rear floating blocking panel, a plurality of cross beams and a plurality of vertical beams, the front floating blocking panel and the rear floating blocking panel are used for blocking drifts, the cross beams and the vertical beams are arranged between the two floating blocking panels and used for supporting the floating blocking panels, the gate piers are U-shaped grooves, the end of the steel structure floating blocking box is of a protruding structure, and the protruding structure is arranged in the U-shaped grooves. The water conservancy project steel structure floating intercepting box can float up and down in the vertical direction to intercept drifts, and the floating intercepting efficiency of the floating box is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of floating object interception equipment for water conservancy projects, and in particular relates to a floating object interception box with a steel structure for water conservancy projects. Background Art

[0002] At present, in water conservancy and hydropower projects, the existence of floating objects on the water has brought inconvenience and potential safety hazards to the above projects.

[0003] In the prior art, a floating barrier row or a floating box floating barrier system is usually used as a floating barrier device to intercept floating objects on the water surface.

[0004] However, when a pontoon interception system is used to intercept floating objects on the water surface, the interception system includes multiple self-floating pontoons, which are connected by pins. The entire pontoon interception system is equivalent to a very long rigid body floating on the water surface. Adjacent pontoons can only make relative movements on the water surface, that is, the floating direction of the pontoons on the water surface is uncertain, which leads to a low efficiency of the pontoons in intercepting floating objects. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a steel structure floating pontoon for water conservancy projects. The pontoon can float up and down in the vertical direction to intercept drifting objects according to the rise and fall of the river water level, thereby greatly improving the floating pontoon's efficiency in intercepting drifting objects.

[0006] The technical solution adopted by the utility model is: a steel structure floating intercepting box for water conservancy projects, characterized in that it includes gate piers arranged on both sides of the river and the steel structure floating intercepting box arranged between the gate piers on both sides for intercepting floating objects, the steel structure floating intercepting box includes two front and rear floating intercepting panels for intercepting floating objects and a plurality of cross beams and a plurality of vertical beams arranged between the two floating intercepting panels for supporting the floating intercepting panels, the gate pier is a U-shaped groove, and the end of the steel structure floating intercepting box is a protruding structure, and the protruding structure is arranged in the U-shaped groove.

[0007] The above-mentioned steel structure floating box for water conservancy projects is characterized in that: the cross beams include bottom cross beams, middle cross beams and top cross beams, the vertical beams include side vertical beams and middle vertical beams, the cross beams are arranged at equal intervals between adjacent vertical beams, and the floating prevention panel, the cross beams and the vertical beams are welded and connected.

[0008] The above-mentioned steel structure floating box for water conservancy projects is characterized in that each of the crossbeams includes two crossbeam flanges and a crossbeam web arranged between the two crossbeam flanges, and crossbeam web stiffening ribs parallel to the crossbeam flanges are arranged on the upper and lower sides of the crossbeam web; the crossbeam web stiffening ribs are welded to the crossbeam web.

[0009] Each of the vertical beams comprises two vertical beam flanges and a vertical beam web arranged between the two vertical beam flanges, and vertical beam web stiffening ribs parallel to the vertical beam flanges are arranged on the left and right sides of the vertical beam web; the vertical beam web stiffening ribs are welded to the vertical beam web.

[0010] The above-mentioned steel structure floating barrier for water conservancy projects is characterized in that it also includes multiple pairs of limit assemblies arranged at the front and rear ends of the two floating barrier panels along the height direction of the steel structure floating barrier, the limit assemblies include front panels and lateral stiffening plates, and the maximum width between the two front panels in each pair of limit assemblies is greater than the width of the U-shaped groove; the limit assemblies and the floating barrier panels are welded at both ends.

[0011] The above-mentioned steel structure floating box for water conservancy projects is characterized by: it also includes a plurality of semicircular cast steel sliders arranged on the outer side wall of the protruding structure; the semicircular cast steel sliders are welded to the floating panel.

[0012] The above-mentioned steel structure floating box for water conservancy projects is characterized in that it also includes a sliding track arranged in the U-shaped groove and adapted to the semicircular cast steel sliding block; the sliding track is fixedly connected to the gate pier.

[0013] The above-mentioned steel structure buoyancy box for water conservancy projects is characterized in that a gap of a preset length is provided between the semicircular cast steel sliding block of the buoyancy box and the sliding track of the gate pier.

[0014] The above-mentioned steel structure floating box for water conservancy projects is characterized in that it also includes a plurality of ear plates arranged at the four corners of the web of the cross beam of the top cross beam, and the ear plates are provided with openings; the ear plates and the web of the cross beam are welded and connected.

[0015] The beneficial effects are inferred as follows:

[0016] In the prior art, when a pontoon interception system is used to intercept floating objects on the water surface, the interception system includes a plurality of self-floating pontoons, which are connected by pins. The entire pontoon interception system is equivalent to a very long rigid body floating on the water surface. Adjacent pontoons can only make relative movements on the water surface, that is, the floating direction of the pontoons on the water surface is uncertain, which leads to a low efficiency of interception by the pontoons.

[0017] The utility model provides a steel structure buoyancy interception pontoon for water conservancy projects. When the water level of the river between the gate piers on both sides of the river rises and falls, the steel structure pontoon moves up and down with the water level of the river by relying on its own weight or buoyancy. Specifically, the protruding structure at the end of the steel structure pontoon cooperates with the gate pier of the U-shaped groove, so that the protruding structure of the pontoon (or the pontoon as a whole) moves up and down in the gate pier of the U-shaped groove along the vertical direction to intercept floating objects on the water surface at the water level where the pontoon is located.

[0018] Therefore, the hydraulic engineering steel structure buoyancy interception buoy in the utility model can float up and down in the vertical direction to intercept floating objects, thereby greatly improving the floating interception efficiency of the buoy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural schematic diagram of a steel structure flotation box for a water conservancy project provided by the utility model;

[0020] Figure 2 for Figure 1 A top view of the steel structure flotation tank;

[0021] Figure 3 A schematic diagram of a crossbeam provided by the utility model;

[0022] Figure 4 for Figure 3 Plan layout of the center beam and cross-section of the beam;

[0023] Figure 5 A schematic diagram of a vertical beam provided by the utility model;

[0024] Figure 6 for Figure 5 Plan layout of the middle vertical beam and cross-section of the vertical beam;

[0025] Figure 7 A top view of the limit assembly provided by the utility model;

[0026] Figure 8 for Figure 7 An enlarged view of the middle limit assembly;

[0027] Fig. 9 A schematic diagram of the structure of a semicircular cast steel slider provided by the utility model;

[0028] Fig.10 for Fig. 9 An enlarged view of the schematic cross-section of the sliding track;

[0029] Fig.11 for Fig. 9 Enlarged view of the semicircular cast steel slider and the sliding track;

[0030] Fig.12 The utility model provides a schematic plan view and a schematic longitudinal section view of the ear plate.

[0031] Description of reference numerals:

[0032] Float arresting panel 1; horizontal beam 2; vertical beam 3;

[0033] Bottom cross beam 21; middle cross beam 22; top cross beam 23;

[0034] Side vertical beam 31; middle vertical beam 32;

[0035] Beam flange 4; Beam web 5; Beam web stiffening rib 6;

[0036] Vertical beam flange 7; vertical beam web 8; vertical beam web stiffening rib 9;

[0037] Limiting assembly 10; front panel 101; lateral stiffening plate 102;

[0038] Semicircular cast steel slide block 11; sliding track 12; gate pier 13;

[0039] Lifting ear plate 14; opening 15. DETAILED DESCRIPTION

[0040] The utility model is further described in detail below in conjunction with the embodiments and drawings. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention, that is, the features of the embodiments, can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] In the prior art, when a pontoon interception system is used to intercept floating objects on the water surface, the interception system includes a plurality of self-floating pontoons, which are connected by pins. The entire pontoon interception system is equivalent to a very long rigid body floating on the water surface. Adjacent pontoons can only make relative movements on the water surface, that is, the floating direction of the pontoons on the water surface is uncertain, which leads to a low efficiency of interception by the pontoons.

[0043] Based on this, the utility model provides a steel structure floating buoy for water conservancy projects, which can float up and down in the vertical direction to intercept floating objects, thereby greatly improving the floating buoyancy efficiency of the buoy.

[0044] Figure 1 A structural schematic diagram of a steel structure floating box for a water conservancy project provided by the utility model. Figure 2 for Figure 1 Top view of the steel structure flotation tank.

[0045] Combination Figure 1 and Figure 2The scheme of the utility model includes gate piers 13 arranged on both sides of the river and a steel structure floating box for intercepting floating objects arranged between the gate piers 13 on both sides. The steel structure floating box includes two front and rear floating interception panels 1 for intercepting floating objects and a plurality of cross beams 2 and a plurality of vertical beams 3 arranged between the two floating interception panels 1 for supporting the floating interception panels 1. The gate pier 13 is a U-shaped groove, and the end of the steel structure floating box is a protruding structure, which is arranged in the U-shaped groove.

[0046] The beneficial effects are inferred as follows:

[0047] In the prior art, when a pontoon interception system is used to intercept floating objects on the water surface, the interception system includes a plurality of self-floating pontoons, which are connected by pins. The entire pontoon interception system is equivalent to a very long rigid body floating on the water surface. Adjacent pontoons can only make relative movements on the water surface, that is, the floating direction of the pontoons on the water surface is uncertain, which leads to a low efficiency of interception by the pontoons.

[0048] The utility model provides a steel structure buoyancy barrier for a water conservancy project. When the water level of the river between the gate piers on both sides of the river rises and falls, the steel structure buoyancy barrier moves up and down with the water level of the river by relying on its own weight or buoyancy. Specifically, the protruding structure at the end of the steel structure buoyancy barrier and the gate pier 13 of the U-shaped groove cooperate with each other, so that the protruding structure of the buoyancy barrier (or the buoyancy barrier as a whole) moves up and down in the vertical direction inside the gate pier 13 of the U-shaped groove, thereby intercepting floating objects on the water surface at the water level where the buoyancy barrier is located.

[0049] Therefore, the hydraulic engineering steel structure buoyancy interception buoy in the utility model can float up and down in the vertical direction to intercept floating objects, thereby greatly improving the floating interception efficiency of the buoy.

[0050] First, the concepts of the related structures or components in the steel structure buoyancy barrier are explained.

[0051] The floating intercepting panel 1 is used to intercept floating objects in a river or on the water surface.

[0052] It can be understood that when the steel structure floating box is placed in a river to intercept drifting objects, the floating panel 1, as a direct force-bearing component, not only needs to bear the effects of various loads (for example, the impact force of water flow and drifting objects), but also is in a dry state when the steel structure floating box is not working (that is, the steel structure floating box is not in the river); it is in a wet state when working. The alternation of the above dry and wet working conditions will accelerate the corrosion of the steel structure floating box, so certain anti-corrosion measures are taken for the steel structure floating box.

[0053] Furthermore, the thickness δ of the anti-floating panel 1 can be designed according to the relevant provisions of the "Design Code for Steel Gates of Water Conservancy and Hydropower" SL74 2019 for the gate panel (i.e., the anti-floating panel 1), so that the anti-floating panel 1 can withstand a certain pressure (such as the impact force of water flow or drifting objects on the anti-floating panel 1), and the pressure is evenly distributed on the anti-floating panel 1.

[0054] Specifically, the calculation formula of the thickness δ of the floating panel is as follows:

[0055]

[0056] Among them, δ is used to characterize the thickness of the anti-floating panel 1, a is used to characterize the short side length of the calculation area of ​​the anti-floating panel 1 (in mm), Ky is used to characterize the bending stress coefficient of the midpoint of the supporting edge of the elastic-plastic thin plate, q is used to characterize the pressure strength at the center of the calculation area of ​​the anti-floating panel 1, α is used to characterize the elastic-plastic adjustment coefficient, when b / a>3, α=1.4; when b / a≤3, α=1.5, σ is used to characterize the allowable bending stress of steel, b is used to characterize the long side length of the calculation area of ​​the anti-floating panel 1 (in mm), and a and b are specifically calculated from the connecting weld between the anti-floating panel 1 and the main (secondary) beam.

[0057] Continue to see Figure 1 and Figure 2 The cross beam 2 includes a bottom cross beam 21, a middle cross beam 22 and a top cross beam 23, the vertical beam 3 includes a side vertical beam 31 and a middle vertical beam 32, the cross beams 2 are arranged at equal intervals between adjacent vertical beams 3, and the floating prevention panel 1, the cross beam 2 and the vertical beam 3 are welded and connected.

[0058] Figure 3 A schematic diagram of a crossbeam provided by the utility model, Figure 4 for Figure 3 The plan layout of the middle beam and the cross-section of the beam.

[0059] See also Figure 3 and Figure 4 The crossbeam 2 can provide support for the floating prevention panel 1 to ensure that the floating prevention panel 1 will not be collapsed by external forces when it is impacted by water flow or intercepts floating objects.

[0060] It can be understood that when the steel structure floating box is placed on the river surface to intercept floating objects, the crossbeam 2 serves as an indirect force-bearing component (compared to the floating panel 1 which serves as a direct force-bearing component).

[0061] Continue to see Figure 3 or Figure 4 The cross-sectional view of the middle cross beam, each cross beam 2 includes two cross beam flanges 4 and a cross beam web 5 arranged between the two cross beam flanges 4, and cross beam web stiffening ribs 6 parallel to the cross beam flanges 4 are arranged on the upper and lower sides of the cross beam web 5; the cross beam web stiffening ribs 6 and the cross beam web 5 are welded together.

[0062] It should be noted that the crossbeam 2 is made of H-shaped steel, and the crossbeam web 5 of the crossbeam 2 is placed horizontally. The crossbeam web 5 can be large in the middle and small at both ends to ensure the rational use of the crossbeam material. The crossbeam flange 4 and the crossbeam web 5 are welded with double-sided fillet welds, and the weld height is not less than 8 mm.

[0063] Since the height of the cross beam web 5 is too high, in order to ensure the stability of the cross beam web 5, two longitudinal stiffening ribs (i.e., cross beam web stiffening ribs 6) can be arranged on the upper and lower sides of the cross beam web 5 according to the relevant requirements of the "Steel Structure Design Standard" GB50017-2017, and each longitudinal stiffening rib includes a pair (two) of longitudinal stiffening ribs arranged on the upper and lower sides of the cross beam web 5. That is, the two longitudinal stiffening ribs include 4 longitudinal stiffening ribs, thereby improving the deformation resistance of the cross beam web 5.

[0064] In order to ensure that the cross-sectional strength of the beam 2 (for example, the cross-sectional strength of the cross section or the longitudinal section) meets the standard, the cross-sectional strength σ of the beam 2 may be verified. Specifically, the calculation formula of the cross-sectional strength σ is as follows:

[0065]

[0066] Among them, σ is used to represent the bending stress around the x-axis, Mx is used to represent the design value of the bending moment around the x-axis of the same section, and γ x It is used to characterize the plastic section development coefficient with respect to the principal axis x, Wnx is used to characterize the net section modulus with respect to the x-axis, and f is used to characterize the design value of the flexural strength of the steel.

[0067] Figure 5 A schematic diagram of a vertical beam provided by the utility model, Figure 6 for Figure 5 The plan layout of the middle vertical beam and the cross-section of the vertical beam.

[0068] See also Figure 5 and Figure 6 The vertical beam 3 can also provide support for the floating panel 1 to ensure that the floating panel 1 will not be collapsed by external force when it is impacted by water flow or intercepts floating objects.

[0069] It is understandable that when the steel structure floating box is placed in a river to intercept floating objects, the vertical beam 3, as a force transmission component, can transmit the load (i.e., force) received by the floating panel 1 to the cross beam 2. At the same time, the vertical beam 3 is also an indirect force receiving component (compared to the floating panel 1 as a direct force receiving component), which can directly bear the end shear force. And the vertical beam 3 includes a side vertical beam 31 and a middle vertical beam 32.

[0070] Six vertical beams 3 are designed in the steel structure box of the utility model, and the six vertical beams 3 include two side vertical beams 31 arranged at both ends of the floating prevention panel 1, and four middle vertical beams 32 arranged between the two side vertical beams 31. Among them, the side vertical beams 31 are used to bear the end shear force, and the middle vertical beams 32 are used to transfer the load (i.e., force) received by the floating prevention panel 1 to the cross beam 2. Exemplarily, the side vertical beams 31 are made of hot-rolled I-beams I45a, and the middle vertical beams 32 are made of H-shaped steel.

[0071] Continue to see Figure 5 or Figure 6 The cross-sectional view of the middle vertical beam, each vertical beam 3 includes two vertical beam flanges 7 and a vertical beam web 8 arranged between the two vertical beam flanges 7, and vertical beam web stiffening ribs 9 parallel to the vertical beam flanges 7 are arranged on the left and right sides of the vertical beam web 8; the vertical beam web stiffening ribs 9 and the vertical beam web 8 are welded together.

[0072] It should be noted that the arrangement direction of the middle vertical beam 3 is perpendicular to the cross beam 2 , and the middle vertical beam 32 is at the same height as the top cross beam 23 .

[0073] Since the height of the vertical beam web 8 is too high, in order to ensure the stability of the vertical beam web 8, two longitudinal stiffening ribs (i.e., vertical beam web stiffening ribs 9) can be arranged on the left and right sides of the vertical beam web 8 according to the relevant requirements of the "Steel Structure Design Standard" GB50017-2017, and each longitudinal stiffening rib includes a pair (two) of longitudinal stiffening ribs arranged on the left and right sides of the vertical beam web 8. That is, the two longitudinal stiffening ribs include 4 longitudinal stiffening ribs, thereby improving the deformation resistance of the vertical beam web 8.

[0074] To ensure that the cross-sectional strength (for example, the cross-sectional strength or longitudinal cross-sectional strength) of the vertical beam 3 meets the standard, the cross-sectional strength σ of the vertical beam 3 can be verified. Specifically, the calculation formula of the cross-sectional strength σ is shown in formula (2), which will not be repeated here.

[0075] Figure 7 This is a top view of the limit assembly provided by the utility model. Figure 8 for Figure 7 Enlarged view of the middle limit stop assembly.

[0076] See also Figure 7 and Figure 8 , and combined with Figure 1 and Figure 2 A plurality of pairs of limit assemblies 10 are arranged at the ends of the front and rear floating prevention panels 1 along the height direction of the steel structure floating prevention box. The limit assemblies 10 include a front panel 101 and a lateral stiffening plate 102. The maximum width between the two front panels 101 in each pair of limit assemblies 10 is greater than the width of the U-shaped groove. The limit assemblies 10 and the floating prevention panels 1 are welded at both ends.

[0077] The limiting assembly 10 of the pontoon is used to limit the position of the pontoon to prevent the pontoon from getting stuck in the groove of the gate pier 13, so that the floating objects at different water levels cannot be intercepted as the water level rises and falls. For example, the limiting assembly 10 is made of 10mm thick steel plate, and the limiting assembly 10 is welded on site after the steel structure pontoon is installed and leveled.

[0078] When the water flow washes the steel structure floating box to the direction of the groove of the gate pier 13, when the front panel 101 in the limiting assembly 10 touches the gate pier 13, the position of the steel structure floating box can be stuck at the current position to prevent the steel structure floating box from further rushing toward and getting stuck in the groove of the gate pier 13 and unable to float up and down.

[0079] When the steel structure buoyancy box floats up and down, there is a certain distance between the front panel 101 and the groove of the gate pier 13, for example, 50mm, so as to ensure that the steel structure buoyancy box can float up and down normally. The lateral stiffening plate 102 is used to provide support for the front panel 101 to prevent the front panel 101 from being deformed by force when it touches the gate pier 13, thereby failing to complete the limit.

[0080] Fig. 9 This is a schematic diagram of the structure of the semicircular cast steel slider provided by the utility model. Fig.10 for Fig. 9 An enlarged view of the cross-sectional diagram of the sliding track. Fig.11 for Fig. 9 Enlarged view of the semicircular cast steel slider and sliding track.

[0081] See also Fig. 9 A plurality of semicircular cast steel sliders 11 are arranged on the outer side wall of the protruding structure, and the semicircular cast steel sliders 11 are welded to the floating panel 1.

[0082] Among them, the semicircular cast steel slider 11 is welded on the floating panel 1 of the steel structure floating box, that is, the position of the semicircular cast steel slider 11 on the floating panel 1 is fixed. When the steel structure floating box floats up and down with the water level, the semicircular cast steel slider 11 and the steel structure floating box are relatively stationary.

[0083] It should be noted that the reason why a semicircular cast steel slider 11 is welded on the steel structure buoyancy box is that when the steel structure buoyancy box floats up and down along the water level line, it will rub against the groove of the gate pier 13. When the friction is large, the steel structure buoyancy box cannot float up and down, that is, it cannot intercept floating objects at different water levels. Therefore, a semicircular cast steel slider 11 is welded on the buoyancy box to reduce friction.

[0084] See also Fig.11 A sliding track 12 is arranged in the U-shaped groove and adapted to the semicircular cast steel slider 11; the sliding track 12 is fixedly connected to the gate pier 13.

[0085] Among them, the sliding track 12 is used for when the steel structure floating box floats up and down with the water level, specifically the semicircular cast steel slider 11 of the steel structure floating box slides in the sliding track 12 on the gate pier 13 with the rise and fall of the water level. The sliding track 12 is made of steel plate, and a certain thickness of stainless steel plate can be welded on the sliding track 12, for example, 3mm thickness. Since the friction coefficient of the stainless steel plate is smaller than the friction coefficient of the sliding track 12 made of steel plate material, the sliding friction between the steel structure floating box, specifically the semicircular cast steel slider 11 of the steel structure floating box and the sliding track 12 on the gate pier 13 can be effectively reduced, so that the steel structure floating box can float up and down more smoothly with the rise and fall of the water level, and intercept drifting objects at different water levels.

[0086] There is a gap of a preset length between the semicircular cast steel slider 11 of the buoy and the sliding track 12 of the gate pier 13. Exemplarily, the gap or distance between the semicircular cast steel slider 11 and the sliding track 12 of the stainless steel plate can be 30 mm, which can be specifically set according to actual conditions, so as to reduce the contact area between the steel structure buoy and the sliding track 12, thereby better reducing the friction between the two.

[0087] In order to make the steel structure floating box be placed on the sliding track 12 of the gate pier 13 more smoothly, the upper part of the sliding track 12 can be designed with an oblique opening to facilitate the steel structure floating box to enter and exit the sliding track 12 of the gate pier 13.

[0088] Fig.12 The utility model provides a schematic plan view and a schematic longitudinal section view of the ear plate.

[0089] See also Fig.12 A plurality of ear plates 14 are arranged at the four corners of the cross beam web 5 of the top cross beam 23, and openings 15 are provided on the ear plates 14; the ear plates 14 and the cross beam web 5 are welded and connected.

[0090] The lug plate 14 is used as a component for lifting the steel structure buoyancy prevention box out of the river after the steel structure buoyancy prevention box fails. Specifically, the steel structure buoyancy prevention box can be lifted upward or placed downward based on the opening 15 on the lug plate 14.

[0091] In order to ensure that the lifting ear plate 14 can stably lift up the steel structure floating box, transverse stiffening ribs are arranged between the beam flanges 4 on the left and right sides of the top beam 23 of the steel structure floating box. For example, the thickness of the transverse stiffening ribs can be 10 mm, and the top of the transverse stiffening ribs is flush with the beam flange 4 of the top beam 23 (that is, the height is the same).

[0092] Continue to see Fig.12First, the relationship between the width B of the ear plate 14 and the diameter d of the opening 15 satisfies formula (3).

[0093] B=(2.4~2.6)d Formula (3)

[0094] Here, d is used to represent the diameter of the opening 15 of the eye plate 14 .

[0095] Second, the relationship between the thickness σ of the eye plate 14 and the width B of the eye plate 14 satisfies the formula (4).

[0096] δ≥B / 20 Formula (4)

[0097] Wherein, B is used to represent the width of the eye plate 14 .

[0098] Third, the relationship between the distance a between the upper edge of the ear plate 14 and the opening 15 and the diameter d of the opening 15 satisfies formula (5).

[0099] a=(0.9~1.05)d Formula (5)

[0100] Here, d is used to represent the diameter of the opening 15 of the eye plate 14 .

[0101] Fourth, verify the compressive stress (i.e., pressure) σ that the wall at the opening 15 of the lug plate 14 satisfies cj This is achieved by the following formula (6).

[0102]

[0103] Wherein, P is used to represent the load (in N) borne by the opening 15 of the lug plate 14, δ is used to represent the thickness of the lug plate 14 (in mm), [σ cj ] is used to characterize local immediate compressive stress.

[0104] Fifth, verify the tensile stress (i.e., tension) σ that the wall of the opening 15 of the lug plate 14 satisfies k This is achieved by the following formula (7).

[0105]

[0106] Among them, [σ cj ] is used to characterize the local immediate bearing stress, r is used to characterize the radius of the opening 15, R is taken as min[B / 2, r+a], B is the width of the lug plate 14, a is used to characterize the distance from the upper edge of the lug plate 14 to the opening 15, [σ k ] is used to characterize the allowable local hole wall tensile stress.

[0107] Since the steel structure floating box is placed in the river for a long time to intercept floating objects, it is easy to be corroded. According to the relevant provisions of the "Code for Corrosion Protection of Hydraulic Metal Structures" SL105-2007, the design service life of the pontoon should be greater than 10 years, so it is necessary to formulate anti-corrosion measures to protect the steel structure floating box body, for example, apply anti-corrosion paint on the surface of the pontoon. The specific anti-corrosion paint matching practices are shown in Table 1.

[0108] Table 1

[0109]

[0110] See Table 1. The anti-corrosion layer should be completed in the factory. The anti-corrosion layer system includes primer, intermediate paint and topcoat. Among them, the primer should have good adhesion and anti-rust performance, the intermediate paint should have shielding performance so that it can be well combined with the primer, and the topcoat should have weather resistance or water resistance. In addition, the color code of the topcoat should comply with the provisions of GB / T3181. The specific color selection requirements should refer to Appendix B of the "Code for Anti-corrosion of Hydraulic Metal Structures" SL105-2007.

[0111] After the steel structure floating barrier box is painted in the factory, a further waterproof test should be carried out to test the waterproof performance of the steel structure floating barrier box. When the waterproof performance of the steel structure floating barrier box meets the standard, the steel structure floating barrier box can be used to intercept floating objects at different water levels.

[0112] The steel structure buoyancy barrier in the utility model is a special equipment in the water conservancy industry. Therefore, it needs to be optimized, designed and processed by a professional water conservancy machinery processing enterprise. Before cutting, the data should be understood in detail, a model should be established, and the plate layout, buoy box body, sliding rail, etc. should be completed in the factory to ensure the welding quality.

[0113] The treatment of the steel structure in this utility model is as follows:

[0114] First, polish the steel structure, such as removing welding slag, spatter, burrs and other attachments from the steel structure, and use a grinding wheel machine to process the sharp cutting edges.

[0115] Second, the steel structure is rust-removed, for example, by spraying or blasting. After the treatment, the surface cleanliness level and surface roughness Rz of the base metal meet the following conditions:

[0116] Condition (1) After blasting or blasting, the surface cleanliness level of the base metal should not be lower than Sa2 specified in GB8923. 0.5 class.

[0117] Condition (2): After blasting or shot blasting, the surface roughness Rz value of the base metal should be no less than 40 μm.

[0118] Third, clean the steel structure and clean the visible grease and other dirt on the surface of the steel structure:

[0119] Method (1): Use solvent cleaning, such as using gasoline or other solvents to scrub the surface of the steel structure. It should be noted that the solvent and rag should be replaced frequently.

[0120] Method (2): Use alkaline cleaning agent for cleaning, such as a mixed solution of sodium hydroxide, sodium carbonate, trisodium phosphate and sodium silicate, for scrubbing or spraying. After cleaning, rinse with clean fresh water 2 to 3 times and dry.

[0121] Method (3): Use emulsion cleaning, and use an emulsified cleaning solution prepared with an emulsifier and a wetting agent for cleaning. After cleaning, rinse with clean fresh water 2 to 3 times and dry.

[0122] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A steel structure floating box for water conservancy projects, characterized by: The invention comprises gate piers (13) arranged on both sides of a river and a steel structure floating intercepting box arranged between the gate piers (13) on both sides for intercepting floating objects. The steel structure floating intercepting box comprises two front and rear floating intercepting panels (1) for intercepting floating objects and a plurality of cross beams (2) and a plurality of vertical beams (3) arranged between the two floating intercepting panels (1) for supporting the floating intercepting panels (1). The gate piers (13) are U-shaped grooves, and the ends of the steel structure floating intercepting box are protruding structures, which are arranged in the U-shaped grooves.

2. A steel structure buoyancy barrier for water conservancy projects according to claim 1, characterized in that: The cross beam (2) comprises a bottom cross beam (21), a middle cross beam (22) and a top cross beam (23); the vertical beam (3) comprises a side vertical beam (31) and a middle vertical beam (32); the cross beams (2) are arranged at equal intervals between adjacent vertical beams (3); and the floating prevention panel (1), the cross beam (2) and the vertical beam (3) are welded together.

3. A steel structure buoyancy barrier for water conservancy projects according to claim 2, characterized in that: Each of the cross beams (2) comprises two cross beam flanges (4) and a cross beam web (5) arranged between the two cross beam flanges (4); cross beam web stiffening ribs (6) parallel to the cross beam flanges (4) are arranged on the upper and lower sides of the cross beam web (5); the cross beam web stiffening ribs (6) and the cross beam web (5) are welded together; Each of the vertical beams (3) comprises two vertical beam flanges (7) and a vertical beam web (8) arranged between the two vertical beam flanges (7); vertical beam web stiffening ribs (9) parallel to the vertical beam flanges (7) are arranged on the left and right sides of the vertical beam web (8); the vertical beam web stiffening ribs (9) and the vertical beam web (8) are welded together.

4. A steel structure buoyancy box for water conservancy projects according to claim 1, characterized in that: It also includes a plurality of pairs of limit assemblies (10) arranged at the front and rear ends of the two floating prevention panels (1) along the height direction of the steel structure floating prevention box, the limit assemblies (10) including a front panel (101) and a lateral stiffening plate (102), the maximum width between the two front panels (101) in each pair of limit assemblies (10) being greater than the width of the U-shaped groove; the limit assemblies (10) and the floating prevention panels (1) are welded at both ends.

5. The steel structure buoyancy barrier for water conservancy projects according to claim 1 is characterized by: It also comprises a plurality of semicircular cast steel sliding blocks (11) arranged on the outer side wall of the protruding structure, wherein the semicircular cast steel sliding blocks (11) are connected to the floating prevention panel (1) by welding.

6. A steel structure floating box for water conservancy projects according to claim 5, characterized in that: It also comprises a sliding track (12) arranged in the U-shaped groove and adapted to the semicircular cast steel sliding block (11); the sliding track (12) is fixedly connected to the gate pier (13).

7. A steel structure buoyancy barrier for water conservancy projects according to claim 6, characterized in that: A gap of a preset length is provided between the semicircular cast steel sliding block (11) of the pontoon and the sliding track (12) of the gate pier (13).

8. The steel structure floating box for water conservancy projects according to claim 3 is characterized by: It also comprises a plurality of ear plates (14) arranged at the four corners of the cross beam web (5) of the top cross beam (23), and openings (15) are provided on the ear plates (14); the ear plates (14) and the cross beam web (5) are connected by welding.

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