A new type of arc-shaped air shield dam

Abstract

The utility model relates to the technical field of hydraulic engineering discloses a novel arc air shield dam. Including concrete bottom plate, side pier and along the anchor assembly of arc track arrangement. Anchor assembly includes underlay, hinged cover plate and upper pressing plate, three through bolt connection. The cover plate is fixed with standard shield and side shield board, and is equipped with air bag below. Among them, standard shield is isosceles trapezoidal that upstream is wide and downstream is narrow, and side shield board is right trapezoidal, and through side splicing makes anchor axis form multi -segment continuous broken line and the whole is arc -like. Air bag is the trapezoidal structure of adaptation, and the interconnection trapezoidal interdiction of board is sealed, and the side is equipped with side seal. The utility model discloses through trapezoidal component splicing and broken line anchor structure, has realized the arc arrangement of air shield dam, has formed the graceful arc waterfall landscape when overflow, and the corner structure is stable, and the sealing is tight, effectively solved the single problem of the existing air shield dam modeling.

Description

Technical Field

[0001] This utility model relates to the technical field of water conservancy engineering and water landscape facilities, and in particular to a novel arc-shaped air shield dam. Background Technology

[0002] Air-supported dams, a new type of movable dam, are widely used in urban river management, water storage and irrigation, and landscape creation due to their simple structure, convenient construction, environmental friendliness, and aesthetic appeal. Traditional air-supported dams typically consist of a steel shield supported by rubber airbags. The inflation and deflation of the airbags control the undulation of the shield, thereby achieving the function of water blocking or flood discharge.

[0003] However, the widely used air-supported dams are limited by the geometry of rectangular shield plates and the linear integrated anchoring foundations, meaning their dam axes are mostly arranged in a straight line. In practical engineering applications, this linear arrangement not only struggles to adapt to winding natural riverbeds, restricting project layout, but also results in monotonous, straight-line waterfalls during overflow, lacking the flowing curves and rich visual layers of natural waterfalls, failing to meet the growing demand for high-quality waterscapes in modern urban water conservancy projects. While theoretically a zigzag arrangement can be achieved through segmented foundation casting, the lack of compatible irregularly shaped shield plate components and dedicated continuous anchoring and sealing structures at corners often leads to serious problems such as seal failure at joints, hinge tearing, or jamming, severely impacting the safe operation of the dam.

[0004] Therefore, this utility model proposes a novel arc-shaped air shield dam to address the shortcomings of existing technologies. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a new type of arc-shaped air shield dam, which aims to improve the problems of existing air shield dams having mostly straight axes, monotonous overflow landscapes, and a lack of layering. It achieves a macroscopic arc-shaped layout and arc-shaped waterfall effect through the splicing of special trapezoidal components.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel arc-shaped air-shield dam, comprising: a concrete base slab, and side piers fixedly connected to both sides of the top surface of the concrete base slab; an anchoring assembly is arranged along an arc-shaped trajectory on the top surface of the concrete base slab, the anchoring assembly comprising a lower pad plate fixed to the surface of the concrete base slab, a hinged cover plate stacked on top of the lower pad plate, an upper pressure plate pressed against the top surface of the hinged cover plate, and a main anchoring bolt perpendicularly penetrating the lower pad plate, the hinged cover plate, and the upper pressure plate; multiple standard shield plates and side shield plates sequentially spliced ​​are fixedly connected to the top surface of the hinged cover plate, and airbags for lifting are provided between the bottom surfaces of the standard shield plates and the side shield plates and the concrete base slab.

[0007] The standard shield plate has a planar shape that is an isosceles trapezoid with a wider upstream side and a narrower downstream side. The side shield plate has a planar shape that is a right-angled trapezoid. Multiple standard shield plates and the side shield plates at both ends are sequentially spliced ​​together along the axial direction of the anchoring assembly through the side edges, so that the axial direction of the anchoring assembly forms multiple continuous broken lines and the whole is arranged in a semi-arc shape.

[0008] Furthermore, the airbag has a planar shape that is an isosceles trapezoidal structure that is wider at the upstream end and narrower at the downstream end. After the airbag is inflated, it supports the bottom surface of the standard shield plate and the side shield plate. The gaps between adjacent standard shield plates are connected by bolts with interlocking seals, and the side shield plate is fixedly provided with a side seal on the side adjacent to the side pier, thereby jointly constructing a closed water-blocking structure that can adapt to the arc splicing.

[0009] Preferably, the axis of the anchoring component forms an angle at the intersection of two adjacent broken lines, and the lower pad is an integral plate structure that spans the intersection of the axes; the hinged cover plate has a continuous broken line structure with the same angle as the included angle along the axis and the hinged cover plate continuously spans the intersection.

[0010] Preferably, the planar shape of the interlocking seal is an isosceles trapezoidal structure that is narrow on the upstream side and wide on the downstream side, and the two sides of the interlocking seal are respectively closely attached to the opposite sidewalls of the two adjacent standard shield plates.

[0011] Preferably, the right-angled side of the side shield plate, which has a right-angled trapezoidal structure, faces the side pier, and the side stop seal is fixedly connected to the right-angled side of the side shield plate, and the side stop seal is pressed against the inner side wall of the side pier from the outer side of the side shield plate.

[0012] Preferably, when the standard shield plate is laid flat and attached to the concrete base plate, the spacing between two adjacent standard shield plates is equal along the length direction.

[0013] Preferably, it also includes a safety restraint strip, one end of which is fixedly connected to the concrete base plate by restraint strip bolts, and the other end of which is connected to the backwater surface of the standard shield plate or the side shield plate to limit the maximum opening angle of the shield plate.

[0014] Preferably, it also includes an upstream level gauge, which is vertically fixed on the upstream side of the concrete base slab and close to the side pier, and the bottom height of the upstream level gauge is lower than the level reference surface corresponding to the maximum water blocking height of the standard shield plate.

[0015] Preferably, the bottom end of the main anchor bolt is pre-embedded and anchored inside the concrete base plate, and the top end of the main anchor bolt extends out of the top surface of the upper pressure plate and is threaded with a fastening nut.

[0016] Preferably, the side stop seal is an L-shaped composite rubber structure, the interstitial stop seal is a vertical composite rubber structure, and the hinged cover plate, the standard shield plate, the side shield plate, and the side pier are sealed together by the side stop seal and the interstitial stop seal to form a closed water barrier.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model, by designing the standard shield plate as an isosceles trapezoidal structure that is wider at the upstream and narrower at the downstream, combined with the right-angled trapezoidal side shield plate and the multi-segment broken-line anchoring component axis, solves the problem that existing air shield dams can usually only be arranged in a straight line and have a monotonous and unattractive overflow landscape. It achieves the effect of presenting a beautiful arc-shaped layout on a macroscopic scale, and the water flow falling evenly along the arc-shaped weir surface during overflow to form an arc-shaped waterfall landscape with a sense of layering and visual impact, which greatly enhances the landscape value of water conservancy projects.

[0019] 2. This utility model solves the problem of stress concentration at corners, leading to tearing of flexible connections or sluggish movement, when a multi-segment folded-line splicing of an air-supported dam is carried out. This is achieved by setting an integrated whole plate under the bottom plate that crosses the intersection of the anchoring axis and allowing the hinged cover plate to continuously cross the intersection without being cut off. This ensures the continuity and structural strength of the flexible hinge system at the bend, ensures the smooth and reliable operation of the dam body during frequent lifting and lowering, and extends the service life of the anchoring system.

[0020] 3. This utility model solves the problem of sealing the wedge-shaped gaps generated after splicing irregular trapezoidal shield plates and the water-stopping problem at the dynamic connection of the two ends of the dam body by using a trapezoidal interlocking seal with a narrow upstream side and a wide downstream side to connect adjacent standard shield plates, and by using the side seal to squeeze and seal the gap between the side shield plate and the side pier. It achieves the effect of tightly fitting each component with geometric complementarity in the airbag lifting state, effectively preventing leakage between plates and laterally, and constructing a tightly sealed water-blocking body. Attached Figure Description

[0021] Figure 1 This is a schematic elevation view of a novel arc-shaped air shield dam proposed in this utility model;

[0022] Figure 2 This is a longitudinal section schematic diagram of a novel arc-shaped air shield dam proposed in this utility model;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the plan layout of a novel arc-shaped air shield dam proposed in this utility model;

[0025] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0026] Legend:

[0027] 1. Hinged cover plate; 2. Standard shield plate; 3. Side shield plate; 4. Interval stop seal; 5. Side stop seal; 6. Safety restraint belt; 601. Restraint belt bolt; 7. Airbag; 8. Anchoring assembly; 801. Main anchor bolt; 802. Lower pad plate; 803. Upper pressure plate; 9. Side pier; 10. Upstream level gauge. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figures 1-5 One embodiment of this utility model is a novel arc-shaped air shield dam, comprising a robust concrete base slab and side piers 9 vertically fixed to both sides of the top surface of the concrete base slab. The concrete base slab serves as the bearing base of the entire air shield dam, bearing the pressure from the water body and the weight of the dam itself. The side piers 9 serve as boundary constraint structures on both sides, forming a flow passage together with the main body of the dam.

[0030] On the top surface of the concrete base slab, a set of continuous anchoring components 8 is arranged along a pre-set arc-shaped trajectory. As a key hub connecting the static foundation and the moving dam body, the anchoring components 8, from bottom to top, include a lower pad plate 803 tightly fitted and fixed to the surface of the concrete base slab, a hinged cover plate 1 stacked and laid flat on top of the lower pad plate 803, and an upper pressure plate 802 pressing and covering the top surface of the hinged cover plate 1. The lower pad plate 803 plays the role of leveling and dispersing stress. The upper pressure plate 802 cooperates with the lower pad plate 803 to firmly clamp the flexible hinged cover plate 1 in the middle. The three are fastened together by a main anchor bolt 801 that vertically penetrates the lower pad plate 803, the hinged cover plate 1 and the upper pressure plate 802. The bottom end of the main anchor bolt 801 is pre-embedded and anchored inside the concrete base slab, and the top end extends out of the upper pressure plate 802 and is equipped with a fastening nut, thereby firmly locking the entire anchoring component 8 to the riverbed foundation.

[0031] As the core water-retaining component, the top surface of the hinged cover plate 1 is fixedly connected to multiple standard shield plates 2 that are sequentially spliced ​​in the transverse direction and side shield plates 3 located at both ends. Each standard shield plate 2 and side shield plate 3 uses the hinged cover plate 1 as a flexible hinge, which can rotate and undulate around the axis of the anchoring component 8. Between the bottom surface of the standard shield plate 2 and the side shield plate 3 and the concrete base plate, there is an airbag 7 for providing lifting power. After the airbag 7 is inflated, it can push upward to support the bottom surface of the standard shield plate 2 and the side shield plate 3, causing them to flip up and stand up to intercept the water flow. After the airbag is vented, the dam body falls back and flattens to discharge the flood.

[0032] To achieve the core arc-shaped layout of this utility model, the planar shape of the standard shield plate 2 is designed as a special isosceles trapezoidal structure with a wider upstream side and a narrower downstream side, while the planar shape of the side shield plates 3 at both ends is designed as a right-angled trapezoidal structure. During installation, multiple standard shield plates 2 and the side shield plates 3 at both ends are sequentially spliced ​​along the axial direction of the anchoring component 8 through their respective sides. Due to the existence of the trapezoidal hypotenuse, an angle is naturally formed between the axes of two adjacent shield plates, so that the axis of the anchoring component 8 is no longer a straight line on a macroscopic scale, but forms multiple continuous broken lines. These broken lines are connected end to end, presenting a smooth transition arc-shaped arrangement. This structure allows the water to flow evenly along the arc-shaped overflow weir surface when it overflows over the top of the dam, forming an arc-shaped waterfall landscape with a sense of enclosure and aesthetic value.

[0033] The axis of the anchoring component 8 forms an angle with a specific degree at the intersection of two adjacent broken lines. In order to ensure the structural strength and continuity of the movable dam body at the turning point, the lower pad plate 803 is not broken at the intersection of the axes, but is designed as an integral plate structure that spans the intersection. This integral plate design can effectively resist the tearing stress generated at the corner when the shield plate rotates, and prevent anchoring failure. At the same time, the hinged cover plate 1 stacked on the lower pad plate 803 also has a continuous broken line structure with the same angle as the included angle along the axis. The hinged cover plate 1 also continuously spans the intersection without splicing or cutting in the middle, thereby ensuring the integrity and sealing of the flexible hinge at the corner, so that the standard shield plate 2 and the side shield plate 3 can rotate and rise synchronously and smoothly on the broken line axis along with the hinged cover plate 1.

[0034] To address the sealing issue of the wedge-shaped gaps created after the trapezoidal standard shield plates 2 are spliced ​​together, a specially designed interlocking seal 4 is bolted to the gaps between adjacent standard shield plates 2. The interlocking seal 4 has an isosceles trapezoidal structure that is narrower on the upstream side and wider on the downstream side. This shape complements the inverted trapezoidal gap formed after splicing two standard shield plates 2 that are wider on the upstream side and narrower on the downstream side. The two sides of the interlocking seal 4 are tightly fitted to the opposite sidewalls of the two adjacent standard shield plates 2. Utilizing the elastic deformation capability of the rubber material, the interlocking seal 4 is tightly clamped in the gap when the airbag 7 lifts the shield plate, thus forming a tight watertight barrier to prevent river water from leaking from the gaps between the plates.

[0035] For the connection points between the two ends of the dam and the side piers 9, the right-angled side of the side shield plate 3, which is a right-angled trapezoidal structure, faces the side pier 9. The side stop seal 5 is fixedly connected to the right-angled side of the side shield plate 3, and the side stop seal 5 is pressed against the inner side wall of the side pier 9 from the outer side of the side shield plate 3. The side stop seal 5 preferably adopts an L-shaped composite rubber structure. This structure has a self-sealing effect under water pressure and can always maintain close contact with the side wall of the side pier 9 as the side shield plate 3 is raised. With the vertically arranged intermittent stop seal 4, the hinged cover plate 1, standard shield plate 2, side shield plate 3 and side pier 9 are sealed and connected by the side stop seal 5 and the intermittent stop seal 4, and finally a watertight closed arc-shaped water-retaining body is constructed.

[0036] As a preferred implementation method, in order to ensure the neat and beautiful appearance of the arc-shaped dam body and the uniformity of the force on each shield plate, when the standard shield plate 2 is laid flat and attached to the concrete base plate, the spacing between two adjacent standard shield plates 2 is designed to be equal along the length direction. This equal spacing design not only facilitates the standardized production and installation of the interlocking seal 4, but also ensures that the water flow thickness is uniform when the overflow forms a waterfall, thus improving the consistency of the landscape.

[0037] As another preferred embodiment, in order to prevent the shield plate from opening too wide or even overturning due to excessive air pressure or water flow impact during operation, the arc-shaped air shield dam also includes a safety restraint belt 6. The safety restraint belt 6 is usually made of high-strength nylon or steel wire rope composite material. One end of the safety restraint belt 6 is firmly fixed to the concrete base plate by restraint belt bolts 601, and the other end is connected to the backwater surface of the standard shield plate 2 or the side shield plate 3. By adjusting the length of the safety restraint belt 6, the maximum lifting height of the shield plate can be precisely limited, thereby ensuring the safe operation of the dam.

[0038] As another preferred embodiment, in order to achieve automated control of dam operation and precise water level regulation, the arc-shaped air shield dam also includes an upstream level gauge 10. The upstream level gauge 10 is vertically fixed on the upstream side of the concrete base plate and close to the side pier 9. The bottom height of the upstream level gauge 10 is set at the level reference plane corresponding to the maximum water blocking height of the standard shield plate 2. This arrangement can ensure accurate data collection when the upstream water level is extremely low or extremely high, providing real-time feedback signals for the control system to regulate the inflation and deflation of the airbag 7.

[0039] As another preferred embodiment, in order to enhance the durability and pull-out resistance of the anchoring system, the bottom end of the main anchor bolt 801 is pre-embedded deep inside the concrete base plate and integrated with the civil foundation. The top end of the main anchor bolt 801 passes through the lower pad 803, the hinge cover plate 1 and the upper pressure plate 802 in sequence and extends out of the top surface of the upper pressure plate 802. The end is threaded with a fastening nut. By tightening the fastening nut, a pre-tightening force is applied to the lower pad 803, the hinge cover plate 1 and the upper pressure plate 802, thereby pressing and fixing the entire flexible hinge system.

[0040] As another preferred embodiment, in order to further optimize the sealing performance, the side stop seal 5 is made of an L-shaped composite rubber structure, which uses the flexible fit of the L-shaped long arm section to fit the side pier 9. The interstitial stop seal 4 is made of a vertical composite rubber structure, which uses the high resilience of rubber to fill the gaps. The hinged cover plate 1, standard shield plate 2, side shield plate 3 and side pier 9 are connected by the combination of side stop seal 5 and interstitial stop seal 4 to form a closed water-retaining body that can adapt to deformation, effectively preventing the sealing failure caused by the frequent rise and fall of the dam body.

[0041] Working principle: When water-blocking landscaping is required, the control system activates the inflation device to inflate the airbag 7 with gas. As the airbag 7 expands, it lifts the hinged cover plate 1, standard shield plate 2, and side shield plate 3 above it. Each shield plate rotates and stands up around the anchoring component 8. Since the axis of the anchoring component 8 is designed as a continuous broken line, and the lower pad plate 803 and the hinged cover plate 1 are continuous structures at the intersection of the broken line, all shield plates can rise synchronously and smoothly along this arc-shaped trajectory without jamming or tearing at the corners.

[0042] During the erection of the shield plate, the interstitial seal 4 is tightly squeezed between the gaps of two adjacent standard shield plates 2, while the side seal 5 slides close to the side wall of the side pier 9 and eventually forms a seal, thus constructing a tight arc-shaped water retaining wall. When the upstream water level rises and overflows the top of the shield plate, the water flows evenly along the entire arc-shaped dam top. Because the dam body is arranged in an arc shape, the falling water naturally converges and disperses, forming an arc-shaped waterfall landscape with a unique visual sense of enclosure and layering, completely changing the rigid overflow effect of the traditional straight-line air shield dam.

[0043] When the upstream level gauge 10 detects that the flood level exceeds the warning value and flood discharge is required, the control system commands the airbag 7 to deflate and inflate. Under the action of its own weight and water pressure, the standard shield plate 2 and the side shield plate 3 quickly fall back and finally lie flat against the concrete base plate, restoring the original flood passage section of the river channel. At this time, the zigzag anchoring structure remains stable, preparing for the next inflation operation. The safety restraint belt 6 is always on standby throughout the entire process. Once the shield plate opening angle exceeds the preset limit, the safety restraint belt 6 will be tightened immediately to prevent the dam from overturning.

Claims

1. A novel arc-shaped air-shield dam, comprising: A concrete base slab, and side piers (9) fixedly connected to both sides of the top surface of the concrete base slab. An anchoring assembly (8) is arranged along an arc-shaped trajectory on the top surface of the concrete base plate. The anchoring assembly (8) includes a lower pad (803) that is attached to and fixed to the surface of the concrete base plate, a hinged cover plate (1) stacked on top of the lower pad (803), an upper pressure plate (802) that is pressed against the top surface of the hinged cover plate (1), and a main anchoring bolt (801) that penetrates vertically through the lower pad (803), the hinged cover plate (1), and the upper pressure plate (802). The top surface of the hinged cover plate (1) is fixedly connected to a number of standard shield plates (2) and side shield plates (3) that are spliced ​​in sequence. An airbag (7) for lifting is provided between the bottom surface of the standard shield plate (2) and the side shield plate (3) and the concrete base plate. Its features are, The standard shield plate (2) has a planar shape that is an isosceles trapezoidal structure with a wider upstream side and a narrower downstream side. The side shield plate (3) has a planar shape that is a right-angled trapezoidal structure. Multiple standard shield plates (2) and the side shield plates (3) at both ends are sequentially spliced ​​along the axial direction of the anchoring assembly (8) through the side edges, so that the axial direction of the anchoring assembly (8) forms multiple continuous broken lines and the whole is arranged in a semi-arc shape. The airbag (7) has a planar shape that is an isosceles trapezoidal structure that is wider at the upstream and narrower at the downstream. After the airbag (7) is inflated, it abuts and supports the bottom surface of the standard shield plate (2) and the side shield plate (3). The gaps between adjacent standard shield plates (2) are bolted together with a stop seal (4), and the side shield plate (3) is fixedly provided with a side stop seal (5) on the side adjacent to the side block (9).

2. The novel arc-shaped air-shield dam according to claim 1, characterized in that, The axis of the anchoring component (8) forms an angle at the intersection of two adjacent broken lines, and the lower pad (803) is an integral plate structure that spans the intersection of the axes. The hinged cover plate (1) has a continuous broken line structure along the axis with the same angle as the included angle, and the hinged cover plate (1) continuously crosses the intersection point.

3. A novel arc-shaped air-shield dam according to claim 1, characterized in that, The planar shape of the interlocking seal (4) is an isosceles trapezoidal structure that is narrow on the upstream side and wide on the downstream side. The two sides of the interlocking seal (4) are respectively closely attached to the opposite side walls of the two adjacent standard shield plates (2).

4. A novel arc-shaped air-shield dam according to claim 1, characterized in that, The right-angled side of the shield plate (3) is a right-angled trapezoidal structure facing the side block (9). The side stop seal (5) is fixedly connected to the right-angled side of the shield plate (3), and the side stop seal (5) is pressed against the inner side wall of the side block (9) away from the outer side of the shield plate (3).

5. A novel arc-shaped air-shield dam according to claim 1, characterized in that, When the standard shield plate (2) is laid flat and attached to the concrete base plate, the spacing between two adjacent standard shield plates (2) is equal along the length direction.

6. A novel arc-shaped air-shield dam according to claim 1, characterized in that, The novel arc-shaped air shield dam also includes a safety restraint zone (6), one end of which is fixedly connected to the concrete base plate by a restraint zone bolt (601), and the other end of which is connected to the backwater surface of the standard shield plate (2) or the side shield plate (3).

7. A novel arc-shaped air-shield dam according to claim 1, characterized in that, The novel arc-shaped air shield dam also includes an upstream level gauge (10), which is vertically fixed on the upstream side of the concrete base plate and close to the side pier (9). The bottom height of the upstream level gauge (10) is lower than the liquid level reference surface corresponding to the maximum water blocking height of the standard shield plate (2).

8. A novel arc-shaped air-shield dam according to claim 1, characterized in that, The bottom end of the main anchor bolt (801) is pre-embedded and anchored inside the concrete base plate, and the top end of the main anchor bolt (801) extends out of the top surface of the upper pressure plate (802) and is threaded with a fastening nut.

9. A novel arc-shaped air-shield dam according to claim 4, characterized in that, The side stop seal (5) is an L-shaped composite rubber structure, the inter-stop seal (4) is a vertical composite rubber structure, and the hinged cover plate (1), the standard shield plate (2), the side shield plate (3) and the side block (9) are sealed together by the side stop seal (5) and the inter-stop seal (4) to form a closed water barrier.

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