An emergency riverbed water retaining weir reinforcing structure suitable for underwater operation

Abstract

This utility model provides an emergency riverbed impoundment reinforcement structure suitable for underwater operations, including a geotextile bag for the damaged weir body, a geotextile fabric for the damaged weir body installed inside the geotextile bag, the two ends of the geotextile fabric extending out of the geotextile bag, a geotextile soft sheet laid on the geotextile bag, the two ends of the geotextile soft sheet overlapping with the geotextile fabric, a gabion slope set on the upstream side of the geotextile bag, the gabion slope including multiple gabion mesh bags filled with stones, a riprap weir crest set on the top of the geotextile bag, and a riprap slope set on the downstream side of the geotextile bag. Both the riprap weir crest and the riprap slope are composed of multiple stones. A top impermeable layer is set inside the riprap weir crest, and the top impermeable layer overlaps with the geotextile soft sheet. This invention ensures a tight bond between the old and new structures, avoids further damage to the reinforced structure, and uses readily available and cost-effective materials for the reinforced structure, enabling rapid restoration of the dam's function.

Description

Technical Field

[0001] This utility model relates to the field of reinforcement technology for flood-damaged dams, specifically to an emergency riverbed dam reinforcement structure suitable for underwater operations. Background Technology

[0002] As an important water control facility, the safe and stable operation of riverbed weirs is crucial. However, in the event of floods exceeding standard levels, the weir structure is highly susceptible to damage, making rapid and effective emergency reinforcement technology key to engineering rescue efforts.

[0003] Currently, conventional emergency reinforcement methods for such flood-damaged projects are often limited by the underwater operating environment, presenting the following challenges: First, they have poor adaptability to irregular terrain after flood damage, making it difficult to ensure a tight bond between the old and new structures; second, the reinforcement materials have limited erosion resistance and are easily damaged again under high-speed water flow; and third, the construction process is complex and inefficient, failing to meet the timeliness requirements of emergency rescue. These limitations pose a significant challenge to the rapid and reliable restoration of the weir's function and stability. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing an emergency riverbed impoundment weir reinforcement structure suitable for underwater operations. This structure ensures a tight bond between the old and new structures, prevents further damage to the reinforcement structure, uses readily available and cost-effective reinforcement materials, employs mature and reusable construction techniques, and enables rapid restoration of the weir's function.

[0005] To address the aforementioned technical problems, this utility model provides an emergency riverbed impoundment reinforcement structure suitable for underwater operations, comprising a geotextile bag for the damaged weir body, a geotextile fabric for the damaged weir body installed inside the geotextile bag, both ends of the geotextile fabric extending out of the geotextile bag, a geotextile flexible sheet laid on the geotextile bag, the two ends of the geotextile flexible sheet overlapping with the geotextile fabric, a gabion slope set on the upstream side of the geotextile bag, the gabion slope comprising multiple gabion mesh bags filled with stones, a riprap weir crest set on the top of the geotextile bag, and a riprap slope set on the downstream side of the geotextile bag, both the riprap weir crest and the riprap slope being formed by multiple stones, a top impermeable layer set inside the riprap weir crest, the top impermeable layer overlapping with the geotextile flexible sheet.

[0006] In some embodiments, the geotextile soft strip includes a geotextile body, on which a plurality of reinforcing strips are provided, and precast concrete blocks are connected to the reinforcing strips.

[0007] In some embodiments, tie strips are provided at intervals on the reinforcing strips, and grooves are formed on the sidewalls of the precast concrete blocks. The tie strips bind and fix the precast concrete blocks to the reinforcing strips through the grooves.

[0008] In some embodiments, the gabion mesh is woven from zinc-aluminum alloy steel wire.

[0009] In some embodiments, the gabion mesh has a length of 2m and a width of 3.5m, a mesh size of 130mm×160mm, and is filled with stones with a particle size of 0.25m~0.6m.

[0010] In some embodiments, the gabion slope extends upward from the overlap between the geotextile soft strip and the geotextile of the damaged dam to the top of the geotextile bag of the damaged dam.

[0011] In some embodiments, the top impermeable layer includes an encapsulation body comprising a composite geomembrane and gravel encapsulated within the composite geomembrane, the bottom of which is in close contact with a geotextile soft sheet.

[0012] In some embodiments, the top impermeable layer is arranged at an angle, with a slope ratio of 1:1 on its upstream side.

[0013] In some embodiments, the composite geomembrane has a two-layer fabric-one-layer membrane structure, comprising two layers of nonwoven fabric and a geomembrane between the two layers of nonwoven fabric.

[0014] In some embodiments, the boulders on the boulder crest and the boulder slope are all hard rocks with a spherical equivalent particle size of 0.9m to 1.3m and a saturated wet compressive strength greater than 50MPa.

[0015] The beneficial effects of this utility model are as follows: 1. This utility model utilizes a geotextile-based flexible raft, reinforced with reinforcing strips and precast concrete blocks, allowing the raft to sink smoothly and uniformly to the bottom of the water. It tightly adheres to the irregular riverbed and weir surface after flood damage, forming a flexible protective layer. This ensures a tight bond between the old and new structures, enhancing the overall structural stability and adaptability to terrain changes. The use of gabions to form the upstream gabion slope effectively disperses the impact of water flow, preventing further damage under high-speed currents. The use of stones to form the riprap weir crest and slope further enhances the overall durability of the reinforced structure. The aforementioned reinforcement materials are readily available, cost-effective, and the construction process is mature and reusable, enabling rapid restoration of the weir's function.

[0016] 2. This utility model forms a continuous and complete seepage prevention system by overlapping the top seepage-proof layer with the geotextile soft drainage and the seepage-proof wall in the geotextile package of the damaged weir. This effectively prevents water seepage and restores the basic function of the impoundment weir in raising the downstream water level of the hub. The top seepage-proof layer has a simple structure and is easy to construct. Furthermore, it is fixed by pressing with boulders, ensuring the reliability and long-term effectiveness of the seepage prevention. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a schematic diagram of the structure of the precast concrete block of this utility model; Figure 3 This is a schematic diagram of the structure of the gabion of this utility model; Figure 4 This is a schematic diagram of the top waterproof layer of this utility model.

[0018] Attached reference numerals: 1-Geotextile soft sheet; 2-Gabion slope; 3-Rock dam crest; 4-Top seepage barrier layer; 41-Composite geomembrane; 42-Crushed stone; 5-Water-damaged dam geotextile bag; 6-Water-damaged dam geotextile; 7-Rock dam slope; 8-Precast concrete block; 81-Groove. Detailed Implementation

[0019] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] This utility model innovatively proposes an emergency riverbed backwater reinforcement structure suitable for underwater operations. The solution comprehensively utilizes materials such as steel wire gabion mesh, geotextile soft drainage, and large-diameter boulders to form a composite protection system similar to "gold-wrapped silver," aiming to significantly improve the terrain adaptability, erosion resistance, and ease of construction of the reinforcement structure. This provides an efficient and reliable solution for emergency repairs of damaged weirs under similar conditions.

[0021] like Figure 1 As shown, the emergency riverbed impoundment weir reinforcement structure includes a geotextile package 5 for the damaged weir body, a geotextile soft sheet 1, a gabion slope 2, a riprap weir crest 3, and a riprap slope 7.

[0022] The damaged dam geotextile 5 is a geotextile bag left after the riverbed impoundment dam is destroyed by water. The damaged dam geotextile 5 contains a damaged dam geotextile 6, and the two ends of the damaged dam geotextile 6 extend out of the damaged dam geotextile 5.

[0023] Geotextile flexible sheet 1 is laid on the geotextile bag 5 of the damaged dam. Both ends of geotextile flexible sheet 1 overlap with the geotextile 6 of the damaged dam. Geotextile flexible sheet 1 includes the geotextile body, with a weight of not less than 400g per square meter. Multiple reinforcing strips are arranged parallel to each other on the geotextile body, with a spacing of 4m between adjacent reinforcing strips. Precast concrete blocks 8 are connected to the reinforcing strips, and tie strips are installed on the reinforcing strips every 8m. Figure 2 The diagram shows the front view and side view of the concrete block. Figure 2 (The left side of the main view) The precast concrete block 8 has a groove 81 on its side wall. The tie strips tie the precast concrete block 8 to the reinforcing strip through the groove 81. The precast concrete block 8 enables the geotextile soft sheet 1 to sink smoothly and at a uniform speed into the water, ensuring accurate laying. Furthermore, its own weight (approximately 23kg per block) allows the geotextile soft sheet 1 to adhere tightly to the riverbed and weir surface underwater, forming a soft sheet protective layer, which enhances the overall stability and adaptability to terrain changes.

[0024] It should be noted that multiple geotextile soft strips 1 are set up, and the length direction of each geotextile soft strip 1 is parallel to the water flow direction, and adjacent geotextile soft strips 1 overlap.

[0025] The gabion slope 2 is located on the upstream side of the geotextile bag 5 of the damaged dam. The gabion slope 2 extends upwards from the overlap between the geotextile soft sheet 1 and the geotextile 6 of the damaged dam to the top of the geotextile bag 5. The gabion slope 2 is formed by multiple gabion mesh bags, creating one or more upstream slopes with a gradient of 1:3. Figure 3 As shown, the gabion mesh is woven from zinc-aluminum alloy steel wire. The length and width of the gabion mesh are 2m and 3.5m respectively, and its mesh size is 130mm×160mm. The gabion mesh is filled with stones with a particle size of 0.25m~0.6m.

[0026] The riprap crest 3 is set on top of the geotextile package 5 of the damaged dam body. The riprap crest 3 is made of multiple riprap. A top seepage barrier layer 4 is set inside the riprap crest 3. The top seepage barrier layer 4 overlaps with the geotextile soft sheet 1, so that the top seepage barrier layer 4, the geotextile soft sheet 1 and the seepage barrier wall in the middle of the geotextile package 5 of the damaged dam body form a complete seepage barrier system, thereby restoring the function of the impounding weir to raise the downstream water level of the hub.

[0027] like Figure 4As shown, the top impermeable layer 4 includes an enclosure, which comprises a composite geomembrane 41 and gravel 42 encased within the composite geomembrane 41. The bottom of the composite geomembrane 41 is tightly attached to the geotextile soft strip 1, and the top and surrounding parts of the composite geomembrane 41 are secured by the boulders of the riprap dam crest 3. The top impermeable layer 4 is arranged at an angle, with a slope ratio of 1:1 on its upstream side. The composite geomembrane 41 has a two-layer fabric-one-membrane structure, comprising two layers of non-woven fabric and a geomembrane between the two layers of non-woven fabric. The non-woven fabric has a specification of 250g / m³. 2 The geomembrane is a 0.5mm thick PE geomembrane. The width of the 42mm gravel is 1m.

[0028] Downstream of the geotechnical package 5 of the damaged dam, a riprap slope 7 is set up, which is also composed of multiple riprap stones.

[0029] The boulders on the riprap crest 3 and the riprap slope 7 are both hard rocks with a spherical equivalent particle size of 0.9m~1.3m, a saturated wet compressive strength greater than 50MPa, a softening coefficient greater than 0.7, a length-to-thickness ratio not greater than 3, and a unit weight not less than 2600kg / m³. 3 .

[0030] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. An emergency riverbed backwater reinforcement structure suitable for underwater operations, characterized in that: The structure includes a geotextile bag (5) for a damaged dam, a geotextile fabric (6) for the damaged dam (5) inside the geotextile bag (5), both ends of the geotextile fabric (6) extending out of the geotextile bag (5), a geotextile soft sheet (1) laid on the geotextile bag (5), both ends of the geotextile soft sheet (1) overlapping with the geotextile fabric (6), and a gabion slope (2) set on the upstream side of the geotextile bag (5). The gabion slope (2) includes multiple gabion mesh bags, each containing stones. A riprap dam top (3) is set at the top of the geotextile bag (5) of the damaged dam. A riprap slope (7) is set on the downstream side of the geotextile bag (5) of the damaged dam. Both the riprap dam top (3) and the riprap slope (7) are filled with multiple stones. A top impermeable layer (4) is set inside the riprap dam top (3). The top impermeable layer (4) overlaps with the geotextile soft sheet (1).

2. The emergency riverbed backwater reinforcement structure for underwater operations according to claim 1, characterized in that: The geotextile soft sheet (1) includes a geotextile body, on which multiple reinforcing strips are provided, and precast concrete blocks (8) are connected to the reinforcing strips.

3. The emergency riverbed backwater reinforcement structure for underwater operations according to claim 2, characterized in that: Tie strips are provided at intervals on the reinforcing strips, and grooves (81) are opened on the side wall of the precast concrete block (8). The tie strips bind and fix the precast concrete block (8) to the reinforcing strips through the grooves (81).

4. The emergency riverbed backwater reinforcement structure applicable to underwater operations according to claim 1, characterized in that: The gabion mesh is woven from zinc-aluminum alloy steel wire.

5. The emergency riverbed backwater reinforcement structure for underwater operations according to claim 4, characterized in that: The gabion mesh bag has a length of 2m and a width of 3.5m, with a mesh size of 130mm×160mm, and is filled with stones with a particle size of 0.25m~0.6m.

6. The emergency riverbed backwater reinforcement structure applicable to underwater operations according to claim 1, characterized in that: The gabion slope (2) extends upward from the overlap between the geotextile soft sheet (1) and the geotextile of the dammed dam (6) to the top of the geotextile bag (5) of the dammed dam.

7. The emergency riverbed backwater reinforcement structure applicable to underwater operations according to claim 1, characterized in that: The top impermeable layer (4) includes a wrapping body, which includes a composite geomembrane (41) and gravel (42) wrapped in the composite geomembrane (41). The bottom of the composite geomembrane (41) is in close contact with the geotextile soft strip (1).

8. The emergency riverbed backwater reinforcement structure for underwater operations according to claim 7, characterized in that: The top impermeable layer (4) is arranged at an angle, with a slope ratio of 1:1 on its upstream side.

9. The emergency riverbed backwater reinforcement structure for underwater operations according to claim 7, characterized in that: The composite geomembrane (41) has a two-layer fabric and one-layer membrane structure. The composite geomembrane (41) includes two layers of non-woven fabric and a geomembrane between the two layers of non-woven fabric.

10. The emergency riverbed backwater reinforcement structure applicable to underwater operations according to claim 1, characterized in that: The boulders of the boulder crest (3) and the boulder slope (7) are all hard rocks with a spherical equivalent particle size of 0.9m~1.3m and a saturated wet compressive strength greater than 50MPa.

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