Waterfall structure for debris flow prevention in loess area

Abstract

The present invention provides a structure for preventing scour and water droplets in debris flow in loess areas, comprising: a drainage structure, wherein the drainage structure comprises a first horizontal section, an inclined section, and a second horizontal section arranged in sequence, wherein the first horizontal section is higher than the second horizontal section, an anti-scour strip is arranged in the inclined section, and a force dissipation tooth is arranged in the second horizontal section. The present invention sets an anti-scour and water droplet in the drainage project, which, on the one hand, facilitates flood discharge in the channel, and on the other hand, can reduce the scour damage of debris flow through the energy dissipation effect of the anti-scour and water droplet. At the same time, various types of force dissipation teeth are dispersedly arranged, which neither affects the flow capacity of the drainage structure nor ensures the smooth drainage of floods or debris flow.

Description

Technical Field

[0001] The invention relates to the field of geological disaster prevention and control, and in particular to a debris flow scour prevention waterfall structure in loess areas. Background Art

[0002] Debris flow is one of the most developed geological disaster types in the loess region. With the economic development and the integration, development and utilization of land resources, some steep slopes are often formed in the middle and lower reaches of the debris flow in the loess region, with heights ranging from more than ten meters to two or three hundred meters. In order to make the debris flow flow smoothly to the downstream, some anti-scouring waterfalls need to be arranged to reduce the impact force and flow rate of the debris flow. However, the waterfall structure in the prior art is single in form, the management cost is high and the effect is not obvious. The present invention focuses on engineering combination, which is not only economical and practical, but also beautiful in appearance and high in safety, and can play a good role in anti-scouring and energy dissipation. Summary of the invention

[0003] The present invention provides a drop structure for preventing debris flow from scouring in loess areas, so as to solve at least one of the above technical problems.

[0004] To solve the above-mentioned problem, as one aspect of the present invention, a debris flow anti-scour waterfall structure in the loess region is provided, comprising: a drainage structure, wherein the drainage structure comprises a first horizontal section, an inclined section and a second horizontal section arranged in sequence, wherein the first horizontal section is higher than the second horizontal section, an anti-scour strip is arranged in the inclined section, and a force dissipating tooth is arranged in the second horizontal section.

[0005] Preferably, the anti-collision strips extend in a zigzag shape in the horizontal direction.

[0006] Preferably, the cross-section of the anti-collision strip is rectangular.

[0007] Preferably, the rectangle has a width of 5-20 cm and a height of 3-5 cm.

[0008] Preferably, the force-dissipating teeth include a plurality of rows of staggered right-angled trapezoidal force-dissipating teeth and at least one row of combined force-dissipating teeth, and the right-angled trapezoidal force-dissipating teeth and the combined force-dissipating teeth are arranged in sequence in a direction away from the anti-collision strip.

[0009] Preferably, the water-facing surface of the right-angled trapezoidal force-dissipating tooth is an inclined surface.

[0010] Preferably, the combined force-dissipating teeth include a first tooth located on the waterfront side and a second tooth located on the water rear side, the first tooth has the same structure as the right-angled trapezoidal force-dissipating teeth, the second tooth is a rectangular force-dissipating tooth, and the second tooth is 3-5 cm higher than the first tooth.

[0011] Preferably, the second horizontal section comprises an enlarged trench bed section, and the force dissipating teeth are arranged in the enlarged trench bed section.

[0012] Preferably, the edge of the enlarged ditch bed section has a "["-shaped structure.

[0013] The present invention arranges anti-scour waterfalls in the drainage project, which, on the one hand, facilitates flood discharge in the channel, and on the other hand, can reduce the scour damage of debris flow through the energy dissipation effect of the anti-scour waterfalls. At the same time, various types of energy dissipation teeth are dispersedly arranged, which not only increases the flow capacity of the drainage structure, but also ensures the smooth drainage of floods or debris flows. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A top view of the present invention;

[0015] Figure 2 for Figure 1 AA section view;

[0016] Figure 3 for Figure 1 BB cross-sectional view;

[0017] Figure 4 It is a schematic cross-sectional view of the anti-collision strip;

[0018] Figure 5 for Figure 1 CC section view;

[0019] Figure 6 It is a structural schematic diagram of a right-angle trapezoidal force-eliminating tooth;

[0020] Figure 7 It is a structural schematic diagram of the combined force-eliminating teeth.

[0021] Among them: 1. The first horizontal section; 2. The inclined section; 3. The second horizontal section; 4. The anti-collision strip; 5. The right-angle trapezoidal force-dissipating teeth; 6. The combined force-dissipating teeth; 7. The first teeth; 8. The second teeth; 9. The expanded ditch bed section; 10. The direction of the debris flow. DETAILED DESCRIPTION

[0022] The following is a detailed description of embodiments of the present invention, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0023] One aspect of the present invention provides a loess area debris flow anti-scour waterfall structure, which is used for mud flow channels with smaller material particles, and specifically relates to a force dissipation measure in a drainage structure, including: a drainage structure, the drainage structure includes a first horizontal section 1, an inclined section 2 and a second horizontal section 3 arranged in sequence, wherein the first horizontal section 1 is higher than the second horizontal section 3, an anti-scour strip 4 is arranged in the inclined section 2, and a force dissipation tooth is arranged in the second horizontal section 3. The angle between the first horizontal section 1 and the inclined section 2 is 120°-150°.

[0024] In the above technical solution, the anti-scour waterfall structure for debris flow in loess area of ​​the present invention arranges anti-scour strips 4 inside the drainage structure, which can reduce the scour damage and flow rate of debris flow without affecting the debris flow flood section.

[0025] Preferably, the anti-collision strip 4 extends in a zigzag shape in the horizontal direction. Preferably, the cross section of the anti-collision strip 4 is rectangular. Preferably, the width of the rectangle is 5-20 cm and the height is 3-5 cm. The anti-collision strip 4 is arranged in multiple rows in a "corrugated" strip, which can disperse the flow state of the debris flow, on the one hand, prevent the debris flow from concentrated impact and damage the drainage structure, and on the other hand, reduce the flow velocity and impact force of the debris flow, and prevent the bottom of the drainage ditch from being hollowed out and damaging the waterfall itself.

[0026] Preferably, the force-dissipating teeth include a plurality of rows of staggered right-angled trapezoidal force-dissipating teeth 5 and at least one row of combined force-dissipating teeth 6, and the right-angled trapezoidal force-dissipating teeth 5 and the combined force-dissipating teeth 6 are arranged in sequence in a direction away from the anti-impact strip 4 to reduce the impact damage of debris flow.

[0027] Preferably, the water-facing surface of the right-angled trapezoidal force-dissipating teeth 5 is an inclined surface to reduce the abrasive effect of the debris flow and protect the safety of the force-dissipating teeth themselves. Preferably, the combined force-dissipating teeth 6 include a first tooth 7 located on the water-facing side and a second tooth 8 located on the water-receiving side, the first tooth 7 having the same structure as the right-angled trapezoidal force-dissipating teeth 5, the second tooth 8 being a rectangular force-dissipating tooth, and the second tooth 8 being three to five centimeters higher than the first tooth 7. The direction of the debris flow 7 flows from upstream to downstream, and the above-mentioned technical solution is adopted, which can, on the one hand, play the role of reinforcing the force-dissipating teeth, and on the other hand, can play the role of preventing scouring thresholds and can stop silting in small amounts.

[0028] Preferably, the second horizontal section 3 includes an enlarged ditch bed section 9, and the force dissipation teeth are arranged in the enlarged ditch bed section 9, so that on the one hand, it is conducive to reducing the impact force and flow velocity of the debris flow, and on the other hand, it is convenient for flood discharge. Preferably, the edge of the enlarged ditch bed section 9 is a smooth transition structure in the shape of "[". In this embodiment, the enlarged ditch bed section 9 is arranged horizontally, with a smooth transition, in the shape of a "square bracket", which suddenly increases the flood discharge channel and achieves the purpose of slowing down the flow velocity.

[0029] The present invention arranges a corrugated anti-scouring section in the steep slope section, arranges a horizontally expanded ditch bed section adjacent to the anti-scouring section, arranges anti-scouring teeth in the expanded ditch bed, and gradually reduces the kinetic energy, flow velocity and water stagnation height, which can not only reduce the impact damage of debris flow, but also prevent the debris flow from crossing the drainage after passing through the waterfall and causing scouring behind the wall, thereby ensuring the safety of the drainage facilities. Compared with existing engineering forms such as energy dissipation pools, the present invention has a simple structure and is easy to construct.

[0030] The present invention arranges anti-scour waterfalls in the drainage project, which, on the one hand, facilitates flood discharge in the channel, and on the other hand, can reduce the scour damage of debris flow through the energy dissipation effect of the anti-scour waterfalls. At the same time, various types of energy dissipation teeth are dispersedly arranged, which not only increases the flow capacity of the drainage structure, but also ensures the smooth drainage of floods or debris flows.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water drop structure for preventing debris flow from scouring in loess areas, characterized in that: include: A drainage structure, the drainage structure comprising a first horizontal section (1), an inclined section (2) and a second horizontal section (3) arranged in sequence, wherein the first horizontal section (1) is higher than the second horizontal section (3), an anti-collision strip (4) is arranged in the inclined section (2), and the anti-collision strip (4) extends in a zigzag shape in the horizontal direction; the second horizontal section (3) is provided with force-dissipating teeth, the force-dissipating teeth comprising a plurality of rows of staggered right-angled trapezoidal force-dissipating teeth (5) and at least one row of combined force-dissipating teeth (6), the right-angled trapezoidal force-dissipating teeth (5) and the combined force-dissipating teeth (6) being arranged in sequence in a direction away from the anti-collision strip (4).

2. The anti-scouring waterfall structure for debris flow in loess area according to claim 1 is characterized in that: The cross section of the anti-collision strip (4) is rectangular.

3. The anti-scouring waterfall structure for debris flow in loess area according to claim 2 is characterized in that: The width of the rectangle is 5cm-20cm and the height is 3cm-5cm.

4. The anti-scouring waterfall structure for debris flow in loess area according to claim 1 is characterized in that: The water-facing surface of the right-angled trapezoidal force-dissipating tooth (5) is an inclined surface.

5. The anti-scouring waterfall structure for debris flow in loess area according to claim 4 is characterized in that: The combined force-dissipating tooth (6) comprises a first tooth (7) located on the waterfront side, and a second tooth (8) located on the waterfront side, the first tooth (7) having the same structure as the right-angled trapezoidal force-dissipating tooth (5), the second tooth (8) being a rectangular force-dissipating tooth, the second tooth (8) being 3 cm to 5 cm higher than the first tooth (7).

6. The anti-scouring waterfall structure for debris flow in loess areas according to any one of claims 1 to 5, characterized in that: The second horizontal section (3) comprises an enlarged trench bed section (9), and the force dissipating teeth are arranged in the enlarged trench bed section (9).

7. The anti-scouring waterfall structure for debris flow in loess area according to claim 6 is characterized in that: The edge of the enlarged trench bed section (9) is in a "["-shaped structure.

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