Fabricated flexible blocking dam
By designing a prefabricated flexible retaining dam, which uses concrete foundations, steel columns, and a wound ring mesh structure, the project solves the problems of high construction difficulty and cost in debris flow prevention and control. It achieves efficient interception of large materials, permeable discharge of small particles, reduced environmental impact, strong adaptability, and rapid construction.
Patent Information
- Application Number
- CN202520067090.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing debris flow prevention methods are difficult to implement, costly, have limited blocking effects, and have a significant impact on the natural environment, making them difficult to promote and apply.
The prefabricated flexible retaining dam consists of a concrete foundation, steel columns, upper anchor ropes, and a wound ring net. It uses a flexible structure to intercept large solid materials, allows water to pass through and discharge small particles, and uses the flexible net to absorb impact energy, reducing the impact on the foundation structure.
It reduces construction difficulty and cost, improves the barrier effect, reduces the impact on the natural environment, is highly adaptable, allows for rapid construction, and is harmless to vegetation growth.
Smart Images
Figure CN223824103U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water conservancy construction technical field, specifically speaking, relate to a kind of assembled flexible blocking dam. BACKGROUND
[0002] Current debris flow prevention concept is "mainly blocking, blocking and management combination, combined with local topography, with disaster setting protection works, priority protection seriously affected areas, a variety of means combination management".
[0003] Under the above prevention concept, there are few uses of debris flow gully in hydropower station engineering, and the current debris flow treatment scale is also small, and the commonly used way is the combination treatment scheme of concrete blocking dam and drainage groove, or rigid permeable type blocking dam such as steel structure gap dam, screen dam and grid dam.
[0004] However, this kind of treatment way has limited debris flow drainage, and the degree of utilization of the site downstream of the blocking dam is also limited.
[0005] We know that the main power of debris flow comes from the largest block material in the forefront, and the previous way is to block the impact of these large block materials with hard structure, and small block fluid is drained through drainage groove, but debris flow is greatly affected by topography, and how to handle the relationship between the two is one of the difficulties.
[0006] In general, the traditional rigid dam construction needs to excavate a large range of foundation trench, and has large construction area, large amount of discarded soil, great construction difficulty, slow construction speed and high construction cost, which leads to great difficulty and cost of debris flow prevention, and is not easy to popularize and apply. INVENTION CONTENTS
[0007] The utility model aims at the deficiency of prior art, and provides an assembled flexible blocking dam which blocks debris flow in a flexible way and reduces debris flow blocking cost and construction difficulty.
[0008] In order to achieve the above object, the utility model adopts the technical scheme of an assembled flexible blocking dam, which comprises a concrete foundation, a steel column, an upper pulling anchor rope and a winding ring net.
[0009] The concrete foundation is arranged along the transverse direction of the dam, and is thickened at the position where the steel column is installed.
[0010] The steel columns are distributed at intervals along the transverse direction of the dam, and the bottom ends of the steel columns are fixed to the concrete foundation by anchor bolts.
[0011] The top end of the upper pulling anchor rope is connected to the top end of the steel column, and the lower end of the upper pulling anchor rope is fixed to the concrete foundation by an upper pulling anchor bolt, and the upper pulling anchor rope is located upstream of the dam, and provides tension to the steel column in a cable-stayed way.
[0012] The winding type annular net is transversely laid out with steel columns as connecting nodes to form the main body of the dam.
[0013] Preferably, the winding type annular net is a high-strength steel wire net.
[0014] Preferably, the single ring of the winding type annular net is formed by 19 turns of mutually winding of single steel wire with a diameter of φ3mm, and the single ring has a diameter of 300mm, each ring is buckled with four surrounding rings, and the strength is not less than 1770MPa.
[0015] Preferably, the winding type annular net is a double-twisted hexagonal net formed by steel wire with a diameter of φ2.2mm.
[0016] Preferably, the winding type annular net is provided with a plurality of horizontal extending intercepting steel wire ropes in the height direction, and the intercepting steel wire ropes are fixed with the steel columns.
[0017] Preferably, the intercepting steel wire rope at the bottom end of the winding type annular net is connected with the tie beam embedded anchor rod through a shackle, and the tie beam embedded anchor rod is an anchor rod arranged in the concrete foundation and distributed along the transverse direction.
[0018] Preferably, the steel column is a one-piece steel column without welding points.
[0019] Preferably, the steel column is externally provided with a hot-dip galvanizing anticorrosion layer.
[0020] Preferably, the upper pulling anchor rope is provided with an energy dissipation and pressure reduction ring, and the energy dissipation and pressure reduction ring is connected with the intercepting steel wire ropes.
[0021] Preferably, the concrete foundation adopts C20 concrete, the surface of the concrete foundation is provided with a steel wire stone cage protection net, and the tie beam embedded anchor rod is a φ25mm steel bar.
[0022] Compared with the prior art, the utility model has substantial features and progress, specifically, the utility model discloses a flexible debris flow blocking dam arranged in a valley or on a slope surface, which is used for intercepting solid substances in a valley type debris flow and has a water permeable feature.
[0023] This structure as a special for deposition and possibly long-term storage of solid material in the debris flow flexible dam protection system, from the debris flow contact to the flexible barrier dam protection system, its most impact energy will be absorbed by the system energy dissipation components, the remaining kinetic energy through the flexible mesh to the upper pull anchor rope, and finally to the anchor base structure to dissipate. Generally, a debris flow of large block material is always pushed in the front of the dilute debris flow, and the principle of blocking these large block material and blocking rock is the same, and the nested connection structure between the flexible net ring has enough strength to absorb the impact energy of the debris flow.
[0024] The scheme takes the flexible net structure connected between the poles laid on both sides of the valley as the main supporting structure, so that the flexible dam can be almost set at any position of the debris flow valley, and the system has strong adaptability; the requirement for foundation bearing capacity is low, and the overall size is small. In terms of the natural environment, the construction process has little influence on the natural environment, does not affect the growth of vegetation, and ensures harmony and unity with the natural environment. BRIEF DESCRIPTION OF DRAWINGS
[0025] Fig. 1 is a laying drawing of the assembled flexible barrier dam in the utility model.
[0026] Fig. 2 is an elevation view of the assembled flexible barrier dam in the utility model.
[0027] Fig. 3 is a splicing unit view of the assembled flexible barrier dam in the utility model.
[0028] In the drawing: 1. Concrete foundation; 2. Steel column; 3. Upper pull anchor rope; 4. Winding type ring net; 5. Anchor rod; 6. Upper pull anchor rope anchor rod; 7. Intercepting steel wire rope; 8. Shackle; 9. Connection beam embedded anchor rod; 10. Energy dissipation and pressure reduction ring. DETAILED DESCRIPTION
[0029] The technical scheme of the utility model will be further described in detail in the specific embodiments.
[0030] As Figs. 1-3 shown, an assembled flexible barrier dam comprises a concrete foundation 1, a steel column 2, an upper pull anchor rope 3 and a winding type ring net 4.
[0031] The concrete foundation 1 is arranged along the transverse direction of the dam, and is thickened at the position of the installed steel column 2, in the embodiment, the concrete foundation 1 is made of poured C20 concrete, and the surface is protected by a steel wire mesh cage.
[0032] The steel columns 2 are spaced apart along the transverse direction of the dam, the bottom ends of the steel columns 2 are fixed in the concrete foundation 1 by anchor bolts 5, and in this embodiment, the steel columns 1 are made of H-shaped steel, the length of a single steel column is not allowed to be welded, the steel columns are subjected to hot galvanizing anticorrosion treatment, and the average thickness of the plating layer is not less than 85 μm.
[0033] The top end of the upper anchor cable 3 is connected to the top end of the steel column 2, and the lower end of the upper anchor cable 3 is fixed in the concrete foundation 1 by an upper anchor cable anchor bolt 6, the upper anchor cable 3 is located upstream of the dam, and provides a tensioning force to the steel column 2 in a cable-stayed manner.
[0034] In this embodiment, the steel wire strength of the upper anchor cable 3 should not be less than 1770 MPa, and the hot galvanizing grade should not be less than AB grade.
[0035] The winding type annular net 4 is transversely laid out with the steel columns 2 as connecting nodes to form the main body of the dam.
[0036] In this embodiment, the winding type annular net 4 is a high-strength steel wire net, which is a high-strength steel wire net for preventing landslides and rock falls in the prior art.
[0037] In the preferred embodiment, a single ring of the winding type annular net is formed by 19 turns of mutually winding φ3 mm single steel wires, the diameter of the single ring is 300 mm, each ring should be buckled with four surrounding rings, and the strength is not less than 1770 MPa.
[0038] In other embodiments, the winding type annular net is a double-twisted hexagonal net made of φ2.2 mm steel wires.
[0039] In order to ensure the interception capacity, in the preferred embodiment, a plurality of horizontal direction extending interception steel wire ropes 7 are arranged along the height direction of the winding type annular net, and the interception steel wire ropes 7 are fixed with the steel columns 2.
[0040] The interception steel wire rope 7 at the bottom end of the winding type annular net is connected with a tie beam embedded anchor rod 9 through a shackle 8, and the tie beam embedded anchor rod is a φ25 mm steel bar.
[0041] The tie beam embedded anchor rod 9 is an anchor rod arranged in the concrete foundation 1 and distributed along the transverse direction.
[0042] In this scheme, an energy dissipation and pressure relief ring 10 is arranged on the upper anchor cable 3, the energy dissipation and pressure relief ring 10 is connected with each interception steel wire rope 7, the pressure relief ring is an independent unit group and can be replaced individually, the support rope pressure relief ring is suitable for φ20-φ24 steel wire ropes, the energy dissipation is not less than 100 kJ, and the starting force is 47 kN-142 kN.
[0043] This scheme is aimed at the debris flow gully which needs to use construction site in high mountain and valley area, starting from the basis of gully water treatment, combining with the principle of debris flow control (blocking, draining, solidifying and other comprehensive control technology), and then designing a set of debris flow gully protection layout system which takes into account the gully water treatment and debris flow control has great practical significance and application value.
[0044] Compared with the prior art, the structure has very obvious overall permeability. In construction, the debris flow flexible dam protection system is assembled on site, has small construction interference, short construction time, fast installation, low construction cost; in addition, the flexible dam is convenient to maintain, if deformation, cracking and dumping occur under the super-strong debris flow alluviation, the gravity sand dam can no longer meet the corresponding interception function, and the sand dam needs to be re-constructed and made, while the debris flow flexible dam protection system only needs to replace the damaged part.
[0045] Finally, it should be noted that: the above has made a detailed description of the preferred embodiments of the patent, but the patent is not limited to the above embodiments, within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the patent.
Claims
1. A prefabricated flexible retaining dam, characterized in that: Includes concrete foundation, steel columns, top anchor ropes, and wound ring netting; The concrete foundation is set along the transverse direction of the dam and is thickened at the location where the steel columns are installed. The steel columns are distributed at transverse intervals along the retaining dam, and the bottom ends of the steel columns are fixed to the concrete foundation by anchor bolts. The top end of the upper anchor rope is connected to the top end of the steel column, and the lower end of the upper anchor rope is fixed in the concrete foundation through the upper anchor rope anchor rod. The upper anchor rope as a whole is located upstream of the retaining dam and provides tension to the steel column by means of oblique tension. The winding ring mesh is laid horizontally with steel columns as connecting nodes, forming the main body of the retaining dam.
2. The prefabricated flexible retaining dam according to claim 1, characterized in that: The wound ring mesh is made of high-strength steel wire mesh.
3. The prefabricated flexible retaining dam according to claim 1 or 2, characterized in that: Each ring of the spiral-wound ring net is made by winding a single φ3mm steel wire 19 times. The diameter of a single ring is 300mm. Each ring should be interlocked with the four surrounding rings, and the strength should not be less than 1770MPa.
4. The prefabricated flexible retaining dam according to claim 1 or 2, characterized in that: The wound ring mesh is a double-twisted hexagonal mesh woven from φ2.2mm steel wire.
5. The prefabricated flexible retaining dam according to claim 1 or 2, characterized in that: The wound ring net has several horizontally extending intercepting steel wire ropes along its height direction, and the intercepting steel wire ropes are fixed to each steel column.
6. The prefabricated flexible retaining dam according to claim 5, characterized in that: The intercepting steel wire rope at the bottom of the winding ring net is connected to the pre-embedded anchor rod of the connecting beam through a shackle. The pre-embedded anchor rod of the connecting beam is an anchor rod set in the concrete foundation and distributed in the transverse direction.
7. The prefabricated flexible retaining dam according to claim 1 or 2, characterized in that: The steel column is a one-piece steel column without welds.
8. The prefabricated flexible retaining dam according to claim 1 or 2, characterized in that: The steel column is covered with a hot-dip galvanized anti-corrosion layer.
9. The prefabricated flexible retaining dam according to claim 5, characterized in that: The upper anchor rope is equipped with an energy dissipation and pressure relief ring, which is connected to each intercepting steel wire rope.
10. The prefabricated flexible retaining dam according to claim 6, characterized in that: The concrete foundation is made of C20 concrete, and a steel wire gabion protective net is installed on the surface of the concrete foundation. The anchor rods of the connecting beam are φ25mm steel bars.