A flood prevention baffle, a water retaining wall with prestress reinforcement structure and a prestress reinforcement method thereof

Abstract

The application discloses a flood prevention baffle with prestress reinforcing structure, a flood prevention wall and a prestress reinforcing method thereof, and relates to the technical field of flood prevention baffle. The flood prevention baffle comprises a baffle main body, a rib plate arranged on one side of the baffle main body and a reinforcing pipe connected with the rib plate, and the baffle main body, the rib plate and the reinforcing pipe are all made of PVC material. The baffle main body comprises two parallel main plates and a plurality of partition plates arranged between the two main plates, the partition plates and the main plates surround to form a plurality of cavities extending along the length direction of the main plates. The rib plate is arranged on one of the main plates, and the reinforcing pipe is installed at the end of the rib plate away from the main plate. The reinforcing pipe is hollow, the axis of the reinforcing pipe is parallel to the main plate, and a prestress cable is arranged in the reinforcing pipe. The flood prevention baffle of the application selects PVC as the main material, greatly reduces the weight of the flood prevention baffle, compensates for the deficiency of the PVC material in bending strength and deformation control ability through structural design, and meets the requirements of the flood prevention baffle in light weight, economy and bending stiffness.

Description

Technical Field

[0001] This invention relates to the field of flood control engineering technology, and in particular to a flood control barrier, a water retaining wall with a prestressed reinforced structure, and a method for prestressing reinforcement thereof. Background Technology

[0002] Currently, most widely used flood control barriers are made of traditional metal materials such as steel and aluminum. These metal flood control barriers have good bending stiffness and deformation resistance, but they are heavy and have high manufacturing and transportation costs. While some lightweight materials can significantly reduce the weight of the barriers, they are more prone to large deflections under water pressure, resulting in insufficient overall bending stiffness. Under conditions of large water heads or large spans, they are prone to significant bending deformation, and their local stability and cross-sectional bending resistance are limited. Therefore, there is an urgent need for a flood control barrier structure that can balance lightweight, economy, and bending stiffness. Summary of the Invention

[0003] Purpose of the invention: To address the shortcomings of existing flood control barriers that cannot simultaneously achieve lightweight, economy, and bending stiffness, this invention provides a flood control barrier with a prestressed reinforced structure, which greatly reduces the weight of the barrier itself while ensuring the bending stiffness and deformation control capability, and reduces the manufacturing and usage costs of the barrier.

[0004] The present invention also provides a flood control barrier wall, which can be constructed with multiple layers and rows of flood control panels according to different usage scenarios, and has a wide range of applications;

[0005] The present invention also provides a prestressing reinforcement method for using the flood control baffle with the above-mentioned prestressed reinforcement structure, so that the baffle has a certain pre-camber before operation, in order to improve its bending load-bearing capacity and service performance after being subjected to water.

[0006] Technical Solution: To solve the above problems, the present invention adopts a flood control baffle with a prestressed reinforced structure, including a baffle body, a rib plate disposed on one side of the baffle body, and a reinforcing tube connected to the rib plate. The baffle body, rib plate, and reinforcing tube are all made of PVC. The baffle body includes two parallel main plates and several partition plates disposed between the two main plates. The partition plates and the main plates surround each other to form multiple cavities extending along the length of the main plates. The rib plate is disposed on one of the main plates, and the reinforcing tube is installed at the end of the rib plate away from the main plate. The reinforcing tube is hollow inside, and the axis of the reinforcing tube is parallel to the main plate. The reinforcing tube is provided with prestressed cables.

[0007] Furthermore, the cross-section of the reinforcing tube is circular, arc-shaped, or elliptical.

[0008] Furthermore, the prestressed cable is arranged along the axis of the reinforcing tube.

[0009] Furthermore, the reinforcing tube is provided with anchors at both ends for fixing the prestressed cable, and the anchors have openings for the prestressed cable to pass through.

[0010] Furthermore, the prestressed cable is one of the following: steel wire, steel strand, stainless steel cable, basalt fiber reinforcement, aramid fiber cable, carbon fiber reinforcement, or high-strength polymer cable.

[0011] Furthermore, the baffle body, ribs, and reinforcing tubes are integrally formed.

[0012] Furthermore, the main body of the baffle is provided with connecting parts on both sides for splicing with adjacent baffles. The connecting parts are one of the following: male and female snap structure, plug groove structure, snap-fit ​​structure or tenon groove structure.

[0013] Furthermore, the rib is located in the middle of the main board in the width direction.

[0014] The present invention also provides a flood control barrier wall, comprising multiple flood control panels as described above, and multiple columns, wherein the columns are provided with guide grooves for installing flood control panels, and multiple layers of flood control panels are installed between adjacent columns.

[0015] The present invention also provides a method for prestressing enhancement of the above-mentioned flood control baffle, wherein a predetermined tension is applied to the prestressed cable by a tensioning device to make the baffle form a prestressed state and form a pre-camber, so as to improve the bending resistance and deformation control capability of the baffle under load.

[0016] Beneficial effects: Compared with the prior art, the significant advantages of this invention are:

[0017] (1) By setting outward protruding ribs in the middle of the box-type baffle and setting reinforcing tubes at its ends, more material is arranged in a position away from the neutral axis, which significantly increases the moment of inertia and section modulus of bending, thereby improving the overall bending stiffness of the baffle.

[0018] (2) It has the function of prestress enhancement. The reinforcing pipe is not only a structural stiffening component, but also a prestress cable channel. When the stiffness of the baffle is still insufficient, the baffle can be pre-tensioned to form a pre-arch, so that the baffle has a better mechanical response during the working stage.

[0019] (3) Compared with the common method of increasing rigidity by thickening the plate wall, the present invention achieves efficient rigidity by optimizing the cross-sectional shape and prestressed cable, effectively reducing the bending deformation of the baffle under water pressure, improving the deformation control capability, and achieving higher material utilization. It balances lightweight and efficient rigidity, making it more suitable for lightweight, prefabricated, and mass production applications.

[0020] (4) Made of PVC material, which greatly reduces the cost of baffle production and transportation; it can be molded in one step by PVC extrusion process, or assembled after separate manufacturing, which is suitable for standardized industrial production.

[0021] (5) Adaptable to various engineering scenarios, this invention is applicable not only to single-piece baffle load-bearing components, but also to assembled flood control retaining walls, emergency water blocking systems, underground garage water blocking gates, temporary cofferdams and other scenarios, and has good engineering promotion value. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the flood control baffle of the present invention;

[0023] Figure 2 This is a schematic diagram of the water-retaining wall structure formed by splicing flood control baffles according to the present invention. Detailed Implementation

[0024] like Figure 1 As shown, a flood control baffle with a prestressed reinforced structure in this embodiment includes a baffle body 1, a rib plate 2 disposed on one side of the baffle body 1, and a reinforcing tube 3 connected to the rib plate 2. The baffle body 1 is a hollow box-shaped plate, including two parallel main plates 11 and five partition plates 12 disposed parallel to each other between the two main plates 11. The partition plates 12 are perpendicular to the main plates 11, and the partition plates 12 and the main plates 11 surround each other to form four cavities 13 extending along the length direction of the main plates 11. The multi-cavity box-shaped structure can improve the out-of-plane stability of the plate itself and the stiffness of the foundation section while ensuring a low self-weight. The upper and lower partition plates 12 are provided with connecting parts 14, which are one of the following: male and female snap structure, plug-in groove structure, snap-fit ​​structure or tenon and groove structure, for splicing with adjacent baffles.

[0025] Rib 2 is disposed on one of the main plates 11, parallel to the partition 12, and positioned in the middle of the main plate 11 in the width direction to reduce the adverse effects of eccentric force. Reinforcing tube 3 is located at the end of the rib away from the baffle body 1. Reinforcing tube 3 is hollow inside, and its axis is parallel to both the partition 12 and the main plate 11. The cross-section of reinforcing tube 3 can be circular, arc-shaped, or elliptical; in this embodiment, it is circular. A prestressed cable 31 is disposed inside the reinforcing tube 3, arranged along its axis. Anchors 32 for fixing the prestressed cable 31 are provided at both ends of the reinforcing tube 3, with openings on the anchors 32 for the prestressed cable 31 to pass through. The anchors 32 can be threaded anchors, wedge-type anchors, end plate anchors, or other anchoring devices suitable for lightweight components, as needed.

[0026] Rib 2 and reinforcing tube 3 constitute the reinforcing structure of the baffle body. The reinforcing tube 3 is located further away from the neutral axis relative to the baffle body 1, which can significantly increase the overall cross-sectional moment of inertia, so that the baffle exhibits higher bending stiffness and smaller bending deformation when subjected to lateral water pressure.

[0027] The baffle body 1, rib 2, and reinforcing tube 3 are all made of PVC. The prestressed cable 31 is one of the following: steel wire, steel strand, stainless steel cable, basalt fiber reinforcement, aramid fiber cable, carbon fiber reinforcement, or high-strength polymer cable. The baffle body 1, rib 2, and reinforcing tube 3 can be integrally molded to improve the connection strength between the various structures. Alternatively, the reinforcing tube and rib can be connected by hot-melt welding, bonding, mechanical connection, or other methods.

[0028] When the water-blocking height is small and the span is short, the stiffening section formed by the rib plate 2 and the reinforcing pipe 3 can meet the usage requirements. When the water-blocking height or span is large, prestressed cables 31 can be further arranged inside the reinforcing pipe 3. By tensioning the prestressed cables 31, the baffle can obtain pre-camber and additional bending resistance, thereby expanding the application range of PVC baffles. During construction, a predetermined tension force is first applied to the prestressed cables 31 through a tensioning device. The applied tension force can be determined according to the specific required water-blocking strength. After tensioning, the prestressed cables 31 are fixed by the anchors 32 at both ends of the reinforcing pipe to keep them in a tensioned state. The baffle forms a pre-compression state in the length direction and obtains a certain pre-camber in the force direction. In this way, under the actual water load, some of the bending deformation caused by the external load can be offset by the pre-camber, thereby further reducing the maximum deflection during the service stage and improving the structural safety and water-stopping reliability of the baffle.

[0029] like Figure 2 As shown, the baffle of the present invention can be used alone as a bending member, or it can be spliced ​​with multiple baffles through the connecting parts 14 at both ends to form a continuous water-retaining wall. Specifically, the water-retaining wall includes multiple columns 4, each column 4 is provided with a guide groove 41 for installing the flood control baffle, and multiple layers of flood control baffles are installed between two adjacent columns 4. The number of columns, the spacing between columns, and the number of baffle layers can be adjusted according to specific circumstances. To verify the bending stiffness and deformation control performance of the waterproof baffle of the present invention, a finite element model simulation was performed using the finite element software ABAQUS. The baffle height in the model was taken as 0.2m, and the column spacing was taken as 1.5m and 2.0m respectively. Under different column spacing and different water-retaining heights, different tension forces were applied to the prestressed cables, and the simulation results of the maximum downstream displacement of the baffle are shown in Table 1 below, and the maximum equivalent stress of the baffle are shown in Table 2 below.

[0030] Table 1 Maximum downstream displacement of the baffle (unit: mm)

[0031]

[0032] Table 2 Summary of Maximum Equivalent Stress of Baffles (Unit: MPa)

[0033]

[0034] Compared with traditional plastic-coated steel sheet piles, the stress limit of plastic-coated steel sheet piles, according to the "Technical Specification for Application of Plastic-coated Steel Sheet Piles" T / CSPSTC 180-2025, is 46 MPa, and the deformation, according to the "Code for Design of Steel Structures" GB50017-2017, is L / 100, which is 46 mm. The stress and maximum displacement in Tables 1 and 2 are both within the limits, indicating that the baffle of this invention meets the performance requirements of traditional plastic-coated steel sheet piles and has good bending stiffness. Furthermore, the maximum displacement is far below the required limit, indicating that this invention has excellent deformation control capabilities.

[0035] Table 1 shows the simulation results of the four sets of data (numbered 0) under four different column spacings and water-retaining heights, without applying tension to the prestressed cables. Comparing the column spacing of 1.5m and water-retaining height of 1.4m, the maximum downstream displacement of the baffle is 5.9mm and 13.1mm when tensioning is applied, and 13.1mm when no tension is applied. For the column spacing of 2m and water-retaining height of 1m, the maximum downstream displacement is 3.65mm and 19.8mm when tensioning is applied, and 19.8mm when no tension is applied. It is evident that applying the corresponding tension can effectively reduce the maximum downstream displacement of the baffle, and the displacement and deformation of the baffle are suppressed. This indicates that the reinforced structure of the present invention effectively improves the bending stiffness and deformation control capability of the baffle.

Claims

1. A flood control barrier with a prestressed reinforced structure, characterized in that, The baffle body (1), the rib (2) disposed on one side of the baffle body (1), and the reinforcing tube (3) connected to the rib (2) are all made of PVC. The baffle body (1) includes two parallel main plates (11) and several partitions (12) disposed between the two main plates (11). The partitions (12) and the main plates (11) surround each other to form a plurality of cavities (13) extending along the length of the main plates (11). The rib (2) is disposed on one of the main plates (11), and the reinforcing tube (3) is installed at the end of the rib (2) away from the main plate (11). The reinforcing tube (3) is hollow inside, and the axis of the reinforcing tube (3) is parallel to the main plate (11). The reinforcing tube (3) is provided with a prestressed cable (31). The two ends of the reinforcing tube (3) are provided with anchors (32) for fixing the prestressed cable (31). The anchors (32) have openings for the prestressed cable (31) to pass through.

2. The flood control barrier as described in claim 1, characterized in that, The cross-section of the reinforcing tube (3) is circular, arc-shaped, or elliptical.

3. The flood control barrier as described in claim 2, characterized in that, The prestressed cable (31) is arranged along the axis of the reinforcing tube (3).

4. The flood control baffle as described in claim 3, characterized in that, The prestressed cable (31) is one of the following: steel wire, steel strand, stainless steel cable, basalt fiber reinforcement, aramid fiber cable, carbon fiber reinforcement, or high-strength polymer cable.

5. The flood control barrier as described in claim 1, characterized in that, The baffle body (1), rib plate (2), and reinforcing tube (3) are integrally formed structures.

6. The flood control barrier as described in claim 1, characterized in that, The baffle body (1) has connecting parts (14) on both sides for splicing with adjacent baffles. The connecting parts (14) are one of the following: male and female buckle structure, plug groove structure, snap-fit ​​structure or tenon groove structure.

7. The flood control barrier as described in claim 1, characterized in that, The rib (2) is located in the middle of the width direction of the main board (11).

8. A flood control retaining wall, characterized in that, It includes multiple flood control baffles as described in any one of claims 1-7, and also includes multiple columns (4), each column (4) having a guide groove (41) for installing the flood control baffles, and multiple layers of flood control baffles installed between two adjacent columns (4).

9. A method for prestressing reinforcement of a flood control baffle as described in any one of claims 1-7, characterized in that, By applying a predetermined tension to the prestressed cables through a tensioning device, the baffle is brought into a prestressed state and pre-cambered, thereby improving the baffle's bending resistance and deformation control under load.

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