An anti-slip multi-stage drop culvert

Abstract

The invention discloses an anti-slip multi-stage drop culvert, comprising a hollow culvert body, wherein the outer top and outer bottom of the culvert body are both stepped, and a plurality of drop steps are arranged on the inner bottom surface of the culvert body along the water flow direction, and an inclined energy-absorbing steep slope is arranged on the step surface of the drop steps. By arranging the outer top and outer bottom of the culvert body in a stepped shape, the weight of the culvert body acts on the soil below it in a vertical direction, and the covering soil is positively pressed on the top of the culvert body, so that the culvert body and the top covering soil can be effectively prevented from slipping without additionally arranging anti-slip support facilities. At the same time, the water flow is impacted and energy-dissipated by the drop steps and the energy-absorbing steep slope inside the culvert body, and the water flow is further energy-dissipated in cooperation with the energy-reducing protrusions on the inner side of the culvert body, so that the water flow speed can be effectively slowed down without additionally arranging energy-dissipating facilities.

Description

Technical Field

[0001] The invention belongs to the technical field of box culvert structures, and in particular relates to an anti-slip multi-stage drop box culvert. Background Art

[0002] A box culvert is a hollow box-shaped culvert made of reinforced concrete. The internal space of the box culvert is used to discharge water. When a new box culvert is built in a steep area, the steep slope of the box culvert causes the water flow rate inside the box culvert to be faster. In order to reduce the flow rate of the water, it is usually necessary to add additional energy dissipation facilities at the entrance or exit of the box culvert to dissipate the energy of the water flow. At the same time, the soil and rocks of the mountain are prone to loosening during the flood season. In order to prevent the box culvert from sliding, anti-slip facilities anchored to the mountain must be installed at the bottom of the box culvert.

[0003] Setting up energy dissipation facilities at the outlet of the box culvert and anti-slip facilities at the bottom of the box culvert not only makes the structure of the box culvert more complicated, but also increases the difficulty of box culvert construction. At the same time, since the top of the traditional box culvert is a relatively smooth slope, when the longitudinal slope of the top of the box culvert is steep, it is easy to cause the top of the box culvert to slip longitudinally, which is not conducive to the safety and stability of the top soil of the box culvert and road facilities.

[0004] Therefore, in view of the defects of traditional box culverts, such as steep longitudinal slope that easily causes top soil to slip, inability to effectively dissipate energy when the water flow rate inside the box culvert is high, and the box culvert itself is extremely easy to slip, the present invention discloses an anti-slip multi-stage waterfall box culvert. Summary of the invention

[0005] The object of the present invention is to provide a multi-stage drop culvert with anti-slip function, which can effectively prevent the culvert body from slipping without setting up additional anti-slip support facilities, and effectively dissipate energy of the water flow and slow down the flow rate of the water flow without setting up additional energy dissipation facilities.

[0006] The present invention is achieved through the following technical solutions:

[0007] A slip-resistant multi-stage waterfall culvert comprises a culvert body, wherein the outer top and outer bottom of the culvert body are both stepped, a plurality of waterfall steps are arranged on the inner bottom surface of the culvert body along the water flow direction, and an inclined energy-absorbing steep slope is arranged on the step surface of the waterfall step.

[0008] Working principle:

[0009] The outer bottom of the box culvert body is arranged in a stepped shape along the inclination direction of the mountain and contacts the soil at the bottom of the box culvert. Compared with the traditional contact between the inclined surface of the bottom of the box culvert and the inclined surface of the soil, since the outer bottom of the box culvert body is stepped, the contact surface with the soil at the bottom of the box culvert body includes a horizontal step surface and a vertical vertical surface, so that the overall weight of the box culvert body acts on the soil at the bottom of the box culvert body in a vertical direction, rather than acting on the soil in a downward inclined direction, which means that the gravity of the box culvert body acting on the soil is vertically downward without a component force inclined along the mountain, so that it is not easy for the box culvert body and the bottom soil to slip, and the anti-slip support facilities at the bottom of the box culvert body can be eliminated, which simplifies the structure of the box culvert body and reduces the difficulty of installing the box culvert body.

[0010] At the same time, the outer top of the box culvert body is also set in a stepped shape. After the top of the box culvert body is filled with soil, the contact surface between the top soil and the outer top of the box culvert body is also a horizontal step surface and a vertical vertical surface, which avoids the separation of the tilt, effectively weakens the tendency of the top soil to slide along the outer top of the box culvert body, and makes the upper soil and road facilities of the box culvert body safer and more stable. Several waterfall steps are set on the inner bottom surface of the box culvert body along the inclination direction of the mountain. When the water flow enters the box culvert body, it will collide with the waterfall step when flowing through each level of the waterfall step, and then dissipate the energy of the water flow, avoiding the additional installation of energy dissipation facilities and other auxiliary structures at the entrance or exit of the box culvert body. While ensuring the energy dissipation effect, it also greatly simplifies the structure of the box culvert body itself. At the same time, in order to further improve the energy dissipation effect of the water flow, an inclined energy-absorbing steep slope is set on each level of the waterfall step. The water flow collides with the slope of the energy-absorbing steep slope, and further dissipates the energy of the water flow.

[0011] In order to better implement the present invention, further, energy-slowing steep slopes with opposite inclination directions are arranged at corresponding positions along the water flow direction on the step surfaces of adjacent waterfall steps.

[0012] Energy-absorbing steep slopes are arranged at corresponding positions on the horizontal step surfaces of two adjacent waterfall steps, and the inclination directions of the energy-absorbing steep slopes on the step surfaces of two adjacent waterfall steps are arranged in opposite directions, that is, one of the energy-absorbing steep slopes is inclined higher at the top and lower at the bottom, and the other energy-absorbing steep slope is inclined lower at the top and higher at the bottom, thereby prolonging the impact process of water flow on the energy-absorbing steep slope and effectively dissipating energy of the water flow.

[0013] In order to better implement the present invention, further, at least two energy-absorbing steep slopes are linearly arranged on the step surface of the waterfall step along the width direction of the waterfall step, and the inclination directions of adjacent energy-absorbing steep slopes on the step surface of the same waterfall step are opposite.

[0014] At least two energy-absorbing steep slopes are arranged side by side on the horizontal step surface of the same waterfall step along the width direction of the waterfall step, and the adjacent energy-absorbing steep slopes on the step surface of the same waterfall step have opposite inclination directions. An energy-absorbing steep slope with the opposite inclination direction is also arranged on the horizontal step surface of the next waterfall step corresponding to the energy-absorbing steep slope on the previous waterfall step. That is, the adjacent energy-absorbing steep slopes on the horizontal step surface of the same waterfall step have opposite inclination directions, and at the same time, the energy-absorbing steep slopes at corresponding positions on the horizontal step surfaces of two adjacent waterfall steps also have opposite inclination directions, thereby forming energy-absorbing steep slopes arranged in sequence in an alternating manner, which effectively enhances the energy dissipation of water flow.

[0015] In order to better implement the present invention, further, a plurality of protruding energy-reducing protrusions are arranged in an array along the water flow direction on both opposite side surfaces inside the culvert body.

[0016] A plurality of energy-reducing protrusions protruding toward the inside of the culvert body are arranged in an array along the water flow direction on the opposite sides of the inner bottom surface of the culvert body. When the water flows, it collides with the energy-reducing protrusions to assist in dissipating energy of the water flow.

[0017] In order to better implement the present invention, further, the top of the energy-cutting protrusion smoothly transitions to the inner top surface of the box culvert body through a curved surface, and the bottom of the energy-cutting protrusion smoothly transitions to the inner bottom surface of the box culvert body through a curved surface.

[0018] In order to better implement the present invention, further, the energy-reducing protrusion is in a semicircular or triangular prism shape.

[0019] In order to better realize the present invention, further, a groove is provided on the open end surface of one end of the culvert body, a flange is provided on the open end surface of the other end of the culvert body and is plugged into the groove, a first connecting ear is provided on one side of the groove, and a second connecting ear corresponding to the first connecting ear is provided on one side of the flange.

[0020] The openings at both ends of the box culvert body are respectively provided with grooves and flanges. When the mountain slope is long and the length of a single section of the box culvert body is insufficient to match the mountain, multiple sections of the box culvert body need to be spliced. The adjacent box culvert bodies are quickly spliced ​​by inserting the flange at one end of one section of the box culvert body into the groove at one end of another section of the box culvert body. At the same time, the end face of the first connecting ear is aligned with the end face of the second connecting ear, and the first connecting ear and the second connecting ear are connected and fastened by connecting steel bars or connecting bolts to achieve the connection between the two adjacent sections of the box culvert body.

[0021] In order to better implement the present invention, further, the groove bottom of the groove is provided with a pressure inclined surface, the end of the flange close to the groove is provided with an extrusion inclined surface corresponding to the pressure inclined surface, and a rubber ring is provided between the pressure inclined surface and the extrusion inclined surface.

[0022] When the flange is inserted into the groove, the extrusion slope at the end of the flange approaches the pressure slope at the bottom of the groove and squeezes the rubber ring, thereby achieving a quick connection between adjacent culvert bodies and sealing the connection through the compressed rubber ring to prevent water from overflowing from the culvert body.

[0023] In order to better realize the present invention, further, the inclination angle of the energy-slowing steep slope is 10°-30°; the height of the waterfall step is 0.3m-1.5m, and the length of the waterfall step is 0.3m-30m.

[0024] In order to better implement the present invention, further, a plurality of waterfall steps are arranged on the inner top surface of the culvert body along the water flow direction.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] (1) The present invention provides a stepped waterfall step along the water flow direction on the inner bottom surface of the culvert body. When the water flows through the waterfall step, it falls and impacts to dissipate the energy of the water flow, thereby effectively slowing down the flow rate of the water flow.

[0027] (2) The present invention provides an energy-absorbing steep slope on the step surface of each waterfall step. The positions of the energy-absorbing steep slopes on the step surfaces of adjacent waterfall steps are correspondingly arranged and the inclination angles are opposite, so as to ensure that the water flow can quickly collide with the energy-absorbing steep slope of the next level after passing through the energy-absorbing steep slope of the previous level, thereby realizing effective energy dissipation of the water flow;

[0028] (3) The present invention arranges a plurality of energy-absorbing steep slopes arranged side by side along the width direction on the step surface of the same level of the waterfall, and the inclination angles of adjacent energy-absorbing steep slopes are opposite. By arranging a plurality of energy-absorbing steep slopes side by side and having different inclination directions, the water flows collide with each other, thereby further improving the energy dissipation effect on the water flow.

[0029] (4) The present invention provides energy-reducing protrusions on two opposite inner sides of the culvert body. When water flows through the side wall of the culvert body, it collides with the energy-reducing protrusions, thereby achieving auxiliary energy dissipation of the water flow.

[0030] (5) The present invention realizes effective energy dissipation of water flow by arranging waterfall steps, energy-reducing steep slopes, and energy-reducing protrusions inside the box culvert body. It is not necessary to arrange additional energy-reducing facilities or other external facilities at the inlet or outlet of the box culvert body to effectively slow down the flow velocity of the water flow, and at the same time simplifies the structure of the box culvert body.

[0031] (6) The present invention sets the outer bottom of the box culvert body in a stepped shape, so that the contact between the box culvert body and the soil at its bottom changes from inclined contact to horizontal contact, so that the weight of the box culvert body acts on the soil below in a vertical direction, effectively preventing the box culvert body from slipping without additional anti-slip support facilities. At the same time, the structure of the box culvert body is simplified, making the pre-embedding of the box culvert body more convenient;

[0032] (7) The present invention sets the outer top of the box culvert body in a stepped shape, so that the contact between the box culvert body and the covering soil on its top is changed from inclined contact to horizontal contact, so that the weight of the covering soil acts on the top of the box culvert body basically in the vertical direction, effectively avoiding the sliding of the covering soil on the top of the box culvert body, ensuring the safety and stability of the top soil of the box culvert body and road facilities, and at the same time simplifying the structure of the box culvert body, making the prefabrication and installation of the box culvert body more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a connection diagram of a multi-section box culvert body;

[0035] Figure 3 It is a schematic diagram of the structure of the energy-slowing steep slope;

[0036] Figure 4 This is a schematic diagram of the structure of the box culvert body.

[0037] Among them: 1-box culvert body; 2-waterfall step; 3-slow energy slope; 4-energy cutting protrusion; 5-groove; 6-flange; 01-first connecting ear; 02-second connecting ear. DETAILED DESCRIPTION

[0038] Embodiment 1:

[0039] A multi-stage drop culvert of the present embodiment is anti-slip, such as Figure 1 and Figure 4 As shown, it includes a hollow culvert body 1, the outer top and outer bottom of the culvert body 1 are both stepped, and a plurality of waterfall steps 2 are arranged on the inner bottom surface of the culvert body 1 along the water flow direction, and an inclined energy-absorbing steep slope 3 is arranged on the step surface of the waterfall step 2.

[0040] The outer bottom of the box culvert body 1 is set as a number of continuous steps, each step includes a horizontal step surface and a vertical vertical surface, and the bottom of the step is provided with a 20cm thick C15 concrete cushion along the step surface and the vertical surface, and the steps at the outer bottom of the box culvert body 1 are in contact with the soil through the concrete cushion. The box culvert body 1 contacts the soil through the step surface and the vertical surface of the outer bottom, replacing the inclined contact between the traditional box culvert and the soil, so that the weight of the box culvert body 1 acts on the soil in the vertical direction, avoiding the box culvert body 1 from sliding along the slope of the mountain. At the same time, the width of the concrete cushion is greater than the width of the box culvert body 1, which can increase the contact area between the bottom of the box culvert body 1 and the soil, reduce the pressure of the box culvert body 1 on the soil, and further ensure the stability of the soil below the box culvert body 1. At the same time, the concrete cushion can assist the box culvert body in leveling the excavation surface, which is convenient for the installation of the box culvert body.

[0041] The above-mentioned step surface may not necessarily be strictly set to be horizontal according to actual use needs, and may also be inclined at a certain angle, and the inclination angle is less than or equal to 8°. The outer top of the culvert body 1 is also set to a plurality of continuous steps, each step includes a horizontal step surface and a vertical vertical surface. The outer top of the culvert body 1 contacts the upper soil through the step surface and the vertical surface, replacing the inclined contact between the traditional culvert and the soil, so that the weight of the upper landfill soil acts on the top of the culvert body 1 basically in the vertical direction, avoiding the slippage of the soil on the top of the culvert body 1.

[0042] Furthermore, a plurality of mesh ridges are provided on the bottom surface of the concrete cushion layer at the outer bottom of the box culvert body 1, and the mesh ridges increase the friction between the concrete cushion layer and the soil below, further preventing the box culvert body 1 from slipping. Similarly, a plurality of mesh grooves are provided on the outer top of the box culvert body 1, and the mesh grooves increase the friction between the outer top of the box culvert body 1 and the soil above, effectively preventing the soil above the box culvert body 1 from slipping.

[0043] Both ends of the culvert body 1 are open, one end is the water inlet end, and the other end is the water outlet end. The culvert body 1 has a hollow waterway inside that connects the water inlet end and the water outlet end. On the bottom surface of the hollow waterway, that is, on the inner bottom surface of the culvert body 1, a number of continuous waterfall steps 2 are arranged along the water flow direction. The waterfall step 2 includes a horizontal step surface and a vertical waterfall surface. When the water flows through the waterfall step 2, it falls and collides with the step surface, effectively dissipating the energy of the water flow and slowing down the flow rate of the water flow. At the same time, in order to further dissipate the energy of the water flow, an inclined energy-reducing steep slope 3 is arranged on the step surface of each waterfall step 2. When the water flows through the step surface of the waterfall step 2, it collides with the energy-reducing steep slope 3 to achieve further energy dissipation of the water flow. Even if there is a large height difference between the water inlet and outlet of the culvert body 1, the water flow can be effectively slowed down by performing double energy dissipation on the water flow through the waterfall step 2 and the energy-reducing steep slope 3, and there is no need to set up additional external energy dissipation facilities such as energy dissipation facilities at the water inlet or outlet of the culvert body 1.

[0044] Furthermore, a plurality of waterfall steps 2 are arranged on the inner top surface of the culvert body 1 along the direction of water flow, and the water flow is mainly dissipated through the waterfall steps 2 arranged on the inner bottom surface of the culvert body 1. However, when the water flow rate is large, the splashing water will collide with the inner top surface of the culvert body 1. Therefore, a plurality of waterfall steps 2 are arranged on the inner top surface of the culvert body 1 along the direction of water flow, and the splashing water is dissipated by the waterfall steps 2.

[0045] Embodiment 2:

[0046] This embodiment is further optimized on the basis of embodiment 1. Figure 1 As shown, energy-slowing steep slopes 3 with opposite inclination directions are arranged at corresponding positions along the water flow direction on the step surfaces of adjacent waterfall steps 2.

[0047] Energy-absorbing steep slopes 3 are arranged at corresponding positions on the step surfaces of two adjacent waterfall steps 2, and the inclination directions of the energy-absorbing steep slopes 3 on the step surfaces of the two adjacent waterfall steps 2 are opposite, ensuring that when water flows through the energy-absorbing steep slope 3 on the first waterfall step 2 and then falls, it collides with the energy-absorbing steep slope 3 on the second waterfall step 2, thereby effectively dissipating energy of the water flow.

[0048] At least two energy-reducing steep slopes 3 are linearly arranged on the step surface of the waterfall step 2 along the width direction of the waterfall step 2, and the adjacent energy-reducing steep slopes 3 on the step surface of the same waterfall step 2 are arranged in opposite directions. That is, at least two energy-reducing steep slopes 3 are arranged side by side along the width direction on the step surface of each waterfall step 2, and at the same time, the same number of energy-reducing steep slopes 3 with opposite inclination angles are arranged at corresponding positions on the step surfaces of adjacent waterfall steps 2. When water flows through the step surface of the waterfall step 2, it first dissipates energy through the energy-reducing steep slopes 3 on the step surface of the waterfall step 2 of the same level, and then the water flows down to the step surface of the waterfall step 2 of the next level and dissipates energy again through the energy-reducing steep slopes 3.

[0049] The inclination angle of the energy-absorbing steep slope 3 is 10°-30°, and the adjacent energy-absorbing steep slopes 3 on the step surface of the waterfall step 2 at the same level are connected by through grooves to prevent water from accumulating on the energy-absorbing steep slope 3. The height of the waterfall step 2 is 0.3m-1.5m, and the length of the waterfall step 2 is 0.3m-30m. The actual height or length of the waterfall step 2 is set accordingly according to the site needs and is not limited to the above range.

[0050] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0051] Embodiment 3:

[0052] This embodiment is further optimized on the basis of embodiment 1 or 2. Figure 1 and Figure 4 As shown, a plurality of protruding energy-reducing protrusions 4 are arranged in an array along the water flow direction on both opposite side surfaces inside the culvert body 1 .

[0053] The energy-reducing protrusions 4 protrude toward the inside of the culvert body 1 , and are continuously or spaced apart on the side of the culvert body 1 . When water flows through the inside of the culvert body 1 , it collides with the energy-reducing protrusions 4 , thereby further dissipating energy of the water flow.

[0054] The top of the energy-reducing protrusion 4 smoothly transitions to the inner top surface of the culvert body 1 through a curved surface, and the bottom of the energy-reducing protrusion 4 smoothly transitions to the inner bottom surface of the culvert body 1 through a curved surface. The energy-reducing protrusion 4 is semicircular or triangular prism-shaped.

[0055] In order to prevent the energy-reducing protrusion 4 from hindering the flow of water, the protrusion height of the energy-reducing protrusion 4 toward the inside of the culvert body 1 is 3 cm-15 cm.

[0056] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0057] Embodiment 4:

[0058] This embodiment is further optimized based on any one of the above embodiments 1-3. Figure 1 , Figure 2 , Figure 4 As shown, a groove 5 is provided on the open end surface of one end of the culvert body 1, a flange 6 plugged into the groove 5 is provided on the open end surface of the other end of the culvert body 1, a first connecting ear 01 is provided on one side of the groove 5, and a second connecting ear 02 corresponding to the first connecting ear 01 is provided on one side of the flange 6.

[0059] The openings at both ends of the culvert body 1 are respectively provided with grooves 5 and flanges 6. When the mountain slope is long and the length of a single section of the culvert body 1 is insufficient to match the mountain, it is necessary to splice multiple sections of the culvert body 1. The adjacent culvert bodies 1 are quickly spliced ​​by inserting the flange 6 at one end of one section of the culvert body 1 into the groove 5 at one end of another section of the culvert body 1. When the flange 6 is fully inserted into the groove 5, the end faces of the connecting ends of the two adjacent sections of the culvert body 1 are fitted to achieve connection, and at the same time, the end face of the first connecting ear 01 is aligned with the end face of the second connecting ear 02, and the end faces of the first connecting ear 01 and the second connecting ear 02 are correspondingly provided with connecting holes. The end faces of the first connecting ear 01 and the second connecting ear 02 are connected and tightened by setting connecting steel bars or connecting bolts in the connecting holes, thereby achieving the connection between the two adjacent sections of the culvert body 1.

[0060] In order to facilitate hoisting, the length of the above-mentioned single-section box culvert body 1 is generally set to 3m-6m. At the same time, for different terrains, the length of the box culvert body 1 can also be set accordingly according to actual conditions and is not limited to the above-mentioned length.

[0061] The groove bottom of the groove 5 is provided with a pressure inclined surface, and the end of the flange 6 close to the groove 5 is provided with an extrusion inclined surface corresponding to the pressure inclined surface, the pressure inclined surface and the extrusion inclined surface have the same inclination direction, and a rubber ring is provided between the pressure inclined surface and the extrusion inclined surface. After the flange 6 is inserted into the groove 5, the extrusion inclined surface at the end of the flange 6 presses the rubber ring, and the rubber ring is used to seal the extrusion inclined surface and the pressure inclined surface, that is, the connection between the flange 6 and the groove 5 is sealed to prevent water from overflowing.

[0062] The other parts of this embodiment are the same as any one of the above embodiments 1-3, so they are not repeated here.

[0063] Example 5

[0064] This embodiment is further optimized based on any one of the above embodiments 1-4. Figure 1 As shown, a top cover is detachably provided on the top of the culvert body 1, a connecting hole is provided on the top of the culvert body 1 along the length direction, a connecting pin is provided at the bottom of the top cover corresponding to the connecting hole on the top of the culvert body 1, and a rubber sealing layer is provided between the top end surface of the culvert body 1 and the bottom end surface of the top cover.

[0065] Further, such as Figure 2 and Figure 3 As shown, a plurality of snap-in grooves are provided on the inner bottom surface of the culvert body 1 along the length direction, and a clamping block inserted into the clamping groove is provided at the bottom of the waterfall step 2. Through the matching clamping connection between the clamping block and the clamping groove, the waterfall step 2 can be detachably and conveniently installed on the inner bottom surface of the culvert body 1, which is also convenient for the subsequent replacement of the waterfall step 2.

[0066] The other parts of this embodiment are the same as any one of the above embodiments 1-4, so they are not repeated here.

[0067] Example 6

[0068] This embodiment is further optimized on the basis of any one of the above embodiments 1-5. The box culvert body 1 is cast with C35-C45 reinforced concrete structure, and a settlement joint is set every 9m along the water flow direction of the box culvert body 1, and rubber is set in the settlement joint for sealing and water stopping. The back of the platform on both sides of the box culvert body 1 is backfilled with sand and gravel, and the backfill compaction degree is not less than 0.96. At the same time, the thickness of the top cover of the box culvert body 1 is 1m-17m.

[0069] When backfilling the top foundation of the box culvert body 1, geogrids should be set and impact compaction should not be used. When the port of the box culvert body 1 passes through the sheet pile wall, the side thickness of the box culvert body 1 is increased to 75cm, the reinforcement remains unchanged, and a 2cm expansion joint is reserved between the pile body, and asphalt wooden boards are set in the expansion joint for caulking.

[0070] The other parts of this embodiment are the same as any one of the above embodiments 1-5, so they are not repeated here.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An anti-slip multi-stage waterfall culvert, comprising a hollow culvert body (1), characterized in that: The outer top and outer bottom of the culvert body (1) are both stepped; a plurality of waterfall steps (2) are arranged on the inner bottom surface of the culvert body (1) along the direction of water flow; inclined energy-reducing steep slopes (3) are arranged on the step surfaces of the waterfall steps (2); corresponding positions on the step surfaces of adjacent waterfall steps (2) along the direction of water flow are provided with energy-reducing steep slopes (3) with opposite inclination directions; at least two energy-reducing steep slopes (3) are linearly arranged on the step surfaces of the waterfall steps (2) along the width direction of the waterfall steps (2), and the energy-reducing steep slopes (3) located on the step surfaces of the same waterfall step (2) are arranged on the inner bottom surface of the culvert body (1) along the direction of water flow; The adjacent energy-reducing steep slopes (3) are arranged with opposite inclination directions; a plurality of protruding energy-reducing protrusions (4) are arranged in an array along the direction of water flow on both opposite side surfaces inside the culvert body (1); a groove (5) is arranged on an open end surface at one end of the culvert body (1); a flange (6) plugged into the groove (5) is arranged on the open end surface at the other end of the culvert body (1); a first connecting ear (01) is arranged on one side of the groove (5); and a second connecting ear (02) correspondingly connected to the first connecting ear (01) is arranged on one side of the flange (6).

2. The anti-slip multi-stage drop culvert according to claim 1, characterized in that: The top of the energy-reducing protrusion (4) smoothly transitions to the internal top surface of the culvert body (1) through a curved surface, and the bottom of the energy-reducing protrusion (4) smoothly transitions to the internal bottom surface of the culvert body (1) through a curved surface.

3. The anti-slip multi-stage drop culvert according to claim 2, characterized in that: The energy-reducing protrusion (4) is semicircular or triangular prism-shaped.

4. The anti-slip multi-stage drop culvert according to claim 1, characterized in that: The groove bottom of the groove (5) is provided with a pressure inclined surface, and the end of the flange (6) close to the groove (5) is provided with an extrusion inclined surface corresponding to the pressure inclined surface, and a rubber ring is provided between the pressure inclined surface and the extrusion inclined surface.

5. The anti-slip multi-stage drop culvert according to any one of claims 1 to 3, characterized in that: The inclination angle of the energy-slowing steep slope (3) is 10°-30°; the height of the waterfall step (2) is 0.3m-1.5m; and the length of the waterfall step (2) is 0.3m-30m.

6. The anti-slip multi-stage drop culvert according to any one of claims 1 to 3, characterized in that: A plurality of waterfall steps (2) are arranged on the inner top surface of the culvert body (1) along the water flow direction.

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