A method for constructing a water-filled bag embankment in stages

Abstract

This invention discloses a method for the phased and rapid construction of water-filled bag dikes. The method includes unfolding the bag body along a predetermined water-retaining line, inflating the bag body with air through an inflation valve to achieve a preliminary inflated shape; adjusting the axial position and water-facing direction of the bag body in this preliminary inflated state, connecting the ends of adjacent bag bodies, and installing ring hoops, anchoring strips, or anchors around the outer periphery of the bag body; gradually filling the bag body with water through an inflation valve and expelling the air through an exhaust valve or exhaust channel, gradually increasing the weight of the bag body and compressing the foundation surface; after the bag body reaches the predetermined water-filled state, verifying and re-tensioning the ring hoops, anchoring strips, or anchors, and checking the end connection status and bottom seepage prevention status. This invention utilizes the difference between the lightweight and easily adjustable air-filled stage and the self-weight compression and shaping stage of the water-filled stage, organizing the positioning, connection, reinforcement, and water-filling shaping processes in stages to improve the continuous construction efficiency and water-retaining stability of water-filled bag dikes.

Description

Technical Field

[0001] This invention relates to the field of on-site construction and emergency response of flood control and disaster relief equipment, and particularly to a method for rapid phased construction of water-filled bag dikes. Background Technology

[0002] Water-filled bag dikes are widely used in scenarios such as dike overflow emergency repair and urban flooding emergency flood control due to their advantages of convenient storage and transportation, rapid molding, and reusability. Current construction methods mostly adopt the process of directly filling water after laying the bags to form the dike. However, the self-weight, stiffness, and deformation characteristics of the flexible bags before and after filling with water are significantly different, and the traditional process has many defects.

[0003] When the bags are directly filled with water, the weight of the water and the hydrostatic pressure will cause a sharp increase in pressure at the bottom of the bag and a significant outward expansion, which can easily lead to problems such as local bulging, overall twisting, misalignment, and end folding. When multiple bag sections are constructed continuously, filling them with water before they are fully shaped will make it difficult to align and overlap the ends of adjacent bags, resulting in poor fit. After the bag is full of water, the friction between it and the foundation surface increases significantly. At this point, installing ring clamps, anchoring strips, and anchors will result in high tensioning resistance, insufficient fit of the reinforcement, uneven stress, and a significant reduction in construction efficiency.

[0004] Meanwhile, existing water bags often use a single composite valve for simultaneous water filling and air venting, which easily leads to problems such as internal air retention, localized bulging, water splashing, and slowed water filling speed. For foundations such as uneven earthen embankments, the water-filled bags deform and cannot fully conform to the base surface, easily forming seepage channels at the bottom, resulting in insufficient water-blocking and seepage prevention stability. After the emergency response, it is difficult to drain the residual water from the bags, and the recovery and transportation are time-consuming.

[0005] Existing technologies do not fully utilize the characteristics of the bag body being easy to adjust during the air-filling and light-load stage and being compacted by its own weight during the water-filling stage. They lack a systematic phased construction process and are difficult to balance on-site construction speed, forming line accuracy and long-term water-blocking safety. There is an urgent need to optimize the construction process. Summary of the Invention

[0006] The purpose of this invention is to provide a method for the rapid construction of water-filled bag dikes in stages.

[0007] To achieve the above objectives, the present invention is implemented according to the following technical solution: This invention includes the following steps: Determine the predetermined water barrier line and clean the base surface, then unfold the bag along the predetermined water barrier line; inflate the bag with air through the inflation valve to form the bag in a preliminary inflated state; In the initial inflated and formed state, adjust the axial position and water-facing direction of the bag body, complete the overlapping connection of the ends of adjacent bags, and install ring hoops, anchoring strips or anchors on the outer periphery of the bag body; Water is gradually added to the bag body through the filling valve in stages, and air is discharged from the bag body through the exhaust valve or exhaust channel, so that the bag body gradually increases in weight and presses the base surface. Once the bag reaches the predetermined water-filled state, the ring clamps, anchor bands, or anchors are checked and tensioned a second time, and the end connection status and bottom seepage prevention status are inspected.

[0008] Furthermore, in the initial inflated forming state: the bag body forms an identifiable water-blocking cross-sectional profile under air support, and the bag body as a whole is in a lightly loaded state that can be pushed, pulled, and finely adjusted.

[0009] Furthermore, the overlapping connection of the ends of the adjacent bags is carried out after the bags are initially inflated and formed, but before they are filled with water and set.

[0010] Furthermore, the installation of the ring hoop, anchoring strip, or anchor includes: fitting the ring hoop around the outer periphery of the bag body in the initial inflated and formed state, wrapping the anchoring strip between the bag body and the base surface, and pre-fixing it with expansion bolts, ground anchors, or ballast components, while reserving a small amount of adjustment space required for subsequent water filling and shaping.

[0011] Furthermore, the phased water filling includes initial bottom filling, posture verification filling, and shaping filling. Initial bottom filling gradually presses the bottom of the bag body against the base surface. Posture verification filling checks the axial position, end connection status, and reinforcement installation status of the bag body after partial water filling, and makes necessary adjustments. Shaping filling brings the bag body to the predetermined water volume or designed water-blocking height.

[0012] Furthermore, the top of the bag is provided with an independent water filling valve and an air vent valve. The water filling valve is used to fill water, and the air vent valve is used to vent air from the bag. The orifice of the air vent valve is smaller than the orifice of the water filling valve.

[0013] Furthermore, an inflation and deflation valve is provided on the back side of the bag. The inflation and deflation valve is used for inflation and initial shaping during the construction stage, and for deflation or connection to a siphon tube for deflation during the recycling stage.

[0014] Furthermore, when constructing multiple bag sections continuously, the initial linear construction is completed section by section in the following order: the previous bag is inflated and pre-fixed, the next bag is inflated and pre-formed, the ends of adjacent bags are aligned, overlapped, and locked, the reinforcement components are pre-installed, and water is filled in stages.

[0015] Furthermore, after the bag reaches the predetermined water-filled state, check the bag's axial position, end connection status, reinforcement tension status, and bottom seepage prevention status. If the inspection finds that the end connection is warped or there are leakage-sensitive areas at the bottom, add ballast sandbags, seepage-proof cloth, edge strips, or flexible sealing materials.

[0016] The beneficial effects of this invention are: This invention is a method for the phased and rapid construction of water-filled bag dikes. Compared with the prior art, this invention has the following technical advantages: This invention employs a pre-inflation process to form the basic outline of the bag under light load, facilitating axis alignment, end alignment, and pre-installation of reinforcement components, thus reducing torsion, misalignment, and folding caused by direct water filling. By completing the connection and ring anchoring pre-installation during the inflation stage, it avoids difficulties in covering and tensioning caused by increased weight, sinking deformation, and outward expansion of the bag after it is fully filled with water, improving on-site construction efficiency. The phased operation of initial bottom water filling, posture verification water filling, and forming water filling allows for timely correction of the alignment, connection, and anchoring status during the gradual weight increase and forming process of the bag. Separate arrangement of the water filling valve and air vent valve, or the establishment of an independent air venting channel, reduces the risks of air retention, localized bulging, slowed water filling, and water splashing. Deformable bottom waterstops and subsequent anti-seepage reinforcement measures improve the fit of the bag bottom on uneven foundation surfaces, enhancing temporary water-blocking stability. The combination of a back-side inflation and venting valve and a siphon venting method improves the efficiency of post-use drainage and recycling. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating the steps of a phased rapid construction method for a water-filled bag dike according to the present invention. Figure 2 This is a schematic diagram of the bag posture adjustment during the initial inflation stage in the embodiments of this specification; Figure 3 This is a schematic diagram of the positioning connection and ring hoop pre-installation stage in the embodiments of this specification; Figure 4 This is a schematic diagram of the staged water filling and shaping and air venting path in the embodiments of this specification; Figure 5 This is a pressure comparison diagram of the bag under air-filled / water-filled conditions in the embodiments of this specification. Detailed Implementation

[0018] The present invention will be further described below through specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0019] The present invention discloses a method for rapid, phased construction of a water-filled bag dike, comprising the following steps: like Figure 1 As shown, this embodiment includes the following steps: Determine the predetermined water barrier line and clean the base surface, then unfold the bag along the predetermined water barrier line; inflate the bag with air through the inflation valve to form the bag in a preliminary inflated state; In the initial inflated and formed state, adjust the axial position and water-facing direction of the bag body, complete the overlapping connection of the ends of adjacent bags, and install ring hoops, anchoring strips or anchors on the outer periphery of the bag body; Water is gradually added to the bag body through the filling valve in stages, and air is discharged from the bag body through the exhaust valve or exhaust channel, so that the bag body gradually increases in weight and presses the base surface. Once the bag reaches the predetermined water-filled state, the ring clamps, anchor bands, or anchors are checked and tensioned a second time, and the end connection status and bottom seepage prevention status are inspected.

[0020] In this embodiment, the initial inflation forming state is as follows: the bag body forms an identifiable water-blocking cross-sectional profile under air support, and the bag body as a whole is in a lightly loaded state that can be pushed, pulled, and finely adjusted.

[0021] In this embodiment, the overlapping connection of the ends of the adjacent bags is carried out after the bags are initially inflated and formed, but before they are filled with water and set.

[0022] In this embodiment, the installation of the ring hoop, anchoring strip, or anchor includes: fitting the ring hoop around the outer periphery of the bag body in the initial inflated and formed state, wrapping the anchoring strip between the bag body and the base surface, and pre-fixing it with expansion bolts, ground anchors, or ballast components, while reserving a small amount of adjustment space for subsequent water filling and shaping.

[0023] In this embodiment, the phased water filling includes initial bottom filling, posture verification filling, and shaping filling. Initial bottom filling gradually presses the bottom of the bag body against the base surface. Posture verification filling checks the axial position, end connection status, and reinforcement installation status of the bag body after partial water filling, and makes necessary adjustments. Shaping filling brings the bag body to the predetermined water volume or the designed water-blocking height.

[0024] In this embodiment, the top of the bag is provided with an independent water filling valve and an air vent valve. The water filling valve is used to fill water, and the air vent valve is used to vent air from the bag. The orifice of the air vent valve is smaller than the orifice of the water filling valve.

[0025] In this embodiment, an inflation and deflation valve is provided on the back side of the bag. The inflation and deflation valve is used for inflation and initial shaping during the construction stage, and for deflation or connection to a siphon tube for deflation during the recycling stage.

[0026] In this embodiment, when constructing multiple bag sections continuously, the initial linear construction is completed section by section in the following order: the previous bag is inflated and pre-fixed, the next bag is inflated and pre-formed, the ends of adjacent bags are aligned, overlapped, and locked, the reinforcement components are pre-installed, and water is filled in stages.

[0027] In this embodiment, after the bag reaches the predetermined water-filled state, the position of the bag axis, the end connection status, the tension status of the reinforcement and the bottom seepage prevention status are checked. When it is found that the end connection is raised or there is a leakage-sensitive part at the bottom, ballast sandbags, seepage prevention cloth, edge strips or flexible sealing materials are added.

[0028] Example 1: Phased Rapid Construction of Single-Segment Bags Before construction, determine the predetermined water-retaining line based on the site water level, water-retaining length and foundation conditions, and remove sharp objects and obvious protrusions from the embankment or ground surface; for the top of the earthen embankment or the foundation surface with local unevenness, lay EPDM foam strips or flexible seepage-proof edge strips below the predetermined water-retaining line as a bottom pre-stopping measure. The bag is then unfolded along the predetermined water-blocking line, with the end connection facing the upstream water-blocking side. The back-side inflation valve is positioned for easy operation, and the top inflation valve and exhaust valve are located above the bag. Air is then introduced into the bag through the back-side inflation valve using a blower or inflation equipment, allowing the bag to initially take shape. At this stage, the bag is not yet heavily inflated with water, and its axis and water-facing direction can be corrected manually by pushing, pulling, or fine-tuning. After the bag body is initially formed, ring hoops or anchoring strips are installed around the outer perimeter of the bag body, and pre-fixed using expansion bolts, ground anchors, ballast components, or temporary anchors. During pre-fixing, it is not necessary to fully tension the bag, leaving a small adjustment space for subsequent water filling and shaping. After pre-installation, initial water filling is performed into the bag through the top water filling valve, and air is expelled from the bag through the top air vent valve. After initial water filling, the compaction status of the bottom of the bag, the axis position, the position of the ring, and the status of the anchors are checked. After confirming that there is no obvious deviation, the attitude verification water filling is performed, and the deformation and fit of the bag are checked again. Finally, the shaping water filling is performed to make the bag reach the predetermined water filling state. After the bag reaches the predetermined water-filled state, the rings, anchor bands and connecting parts are tightened a second time, and the bottom pre-water-stopping material is checked to ensure it is compressed. After use, the drain outlet or the back-water side air-drain valve can be opened to drain the water. When the residual water inside the bag is difficult to drain, a siphon pipe can be connected through the back-water side air-drain valve to improve the drainage efficiency.

[0029] Example 2: Continuous Construction Process of Multi-Segment Bags When constructing a multi-section bag continuously, the first section of the bag is first unfolded along the predetermined water-blocking line and inflated to form a preliminary shape. After adjusting its axial position and water-facing direction, its end position is marked and the rings are pre-fixed. Then, the second section of the bag is unfolded and inflated to form a preliminary shape, so that the end of the second section of the bag overlaps with the end of the first section of the bag. Under light load, the end fitting connection and metal buckle locking are completed. Then, the rings are installed on the second section of the bag and pre-fixed. The subsequent bags are constructed section by section in the following order: unfolding and positioning, initial inflation and shaping, end overlap, connection and locking, and pre-fixing with ring hoops, until the initial shape of the continuous sub-dike is formed; after each section of the bag is initially formed, connected and pre-fixed, it is then filled with water in sections and batches according to the site terrain, water direction and water pump configuration. During the water filling process, the water filling progress on both sides of the connection between adjacent bags should be controlled to be relatively coordinated to avoid one side of the bag being filled with water too early, which would cause uneven stress at the connection or warping of the overlapping parts. Each bag section is filled with water through the top water filling valve and vented through the top air vent valve. As the water gradually enters the bag, the bag's own weight increases and presses down on the base surface. The pre-installed rings are further tightened against the outer surface of the bag, thereby realizing the transition from a light-load adjustment state to a stable water-blocking state.

[0030] Example 3: Pressure Comparison and Process Necessity under Inflated / Water-filled Bag Conditions like Figure 5 As shown, when the bag is in the initial inflated and formed state, the shape support inside the bag is mainly provided by air, the internal pressure and self-weight are small, the contact pressure between the bottom of the bag and the base surface is low, and the whole still has the construction characteristics of being able to be pushed, pulled and finely adjusted. In this state, the operation resistance is small when performing axis correction, end overlap positioning, ring hoop fitting, anchor belt wrapping and anchor pre-fixing. This can avoid the difficulty of adjustment due to the increased weight and friction after the bag is full of water. Once the bag is filled with water, the weight of the water and the hydrostatic pressure increase significantly. This generates a large downward pressure on the foundation surface from the bottom of the bag, and the lateral outward expansion pressure increases simultaneously. The frictional resistance between the bag and the embankment or ground also increases significantly. If end alignment, connection pressing, or hoop installation is performed at this time, it is necessary to overcome the combined resistance caused by the bag's own weight, contact friction, and outward deformation. This can easily lead to misalignment at the connection, difficulty in turning the hoop up and wrapping it, insufficient adhesion of the anchoring strip, or uneven local stress. The pre-installation of positioning connections and reinforcement components such as hoops and anchoring strips is arranged after the initial inflation and before the phased water filling. This utilizes the characteristic of the inflated state—being tangible yet lightly loaded—to complete linear adjustment and pre-positioning of reinforcement. Then, through initial bottom-filling, posture-checking filling, and final filling, the bag gradually increases in weight and tightens the foundation surface. Finally, secondary tensioning and seepage prevention reinforcement are performed. This sequence of steps balances construction convenience and water-blocking stability after filling, representing a key difference from direct water filling construction methods. Table 1 shows the comparison of pressure and hoop stress in the inflated / water-filled states of the bag. Table 1 Comparison of pressure and ring force under inflated / water-filled conditions of the bag

[0031] The values ​​in the table are examples to illustrate the necessity of the process and can be adjusted according to the bag specifications, water filling height, foundation conditions and ring spacing. They do not constitute a limitation on the scope of protection of this invention.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for the rapid construction of a water-filled bag embankment in stages, characterized by, Includes the following steps: Determine the predetermined water barrier line and clean the base surface, then unfold the bag along the predetermined water barrier line; Air is injected into the bag through the inflation valve, so that the bag is initially inflated and formed. In the initial inflated and formed state, adjust the axial position and water-facing direction of the bag body, complete the overlapping connection of the ends of adjacent bags, and install ring hoops, anchoring strips or anchors on the outer periphery of the bag body; Water is gradually added to the bag body through the filling valve in stages, and air is discharged from the bag body through the exhaust valve or exhaust channel, so that the bag body gradually increases in weight and presses the base surface. Once the bag reaches the predetermined water-filled state, the ring clamps, anchor bands, or anchors are checked and tensioned a second time, and the end connection status and bottom seepage prevention status are inspected.

2. The method of claim 1, wherein the method further comprises the steps of: providing a plurality of the water-filled bags; and providing a plurality of the bag supports. The initial inflated forming state: the bag body forms an identifiable water-blocking cross-sectional profile under air support, and the bag body as a whole is in a lightly loaded state that can be pushed, pulled, and finely adjusted.

3. The method for phased rapid construction of a water-filled bag dike according to claim 1, characterized in that, The overlapping connection of the ends of adjacent bags is carried out after the bags are initially inflated and formed, but before they are filled with water and set.

4. The method for phased rapid construction of a water-filled bag dike according to claim 1, characterized in that, The installation of the ring hoop, anchoring strip, or anchor includes: fitting the ring hoop around the outer periphery of the bag body in the initial inflated and formed state, wrapping the anchoring strip between the bag body and the base surface, and pre-fixing it with expansion bolts, ground anchors, or ballast components, while reserving a small amount of adjustment space for subsequent water filling and shaping.

5. The method of claim 1, wherein the method further comprises the steps of: providing a plurality of water bag segments; and connecting the plurality of water bag segments to form the water bag. 5 The top of the bag is equipped with an independent water filling valve and an air vent valve. The water filling valve is used to fill water, and the air vent valve is used to vent air from the bag. The orifice of the air vent valve is smaller than that of the water filling valve.

6. The method for phased rapid construction of a water-filled bag dike according to claim 1, characterized in that, An inflation and deflation valve is installed on the back side of the bag. The inflation and deflation valve is used for inflation and initial shaping during the construction stage, and for deflation or connection to a siphon tube for deflation during the recycling stage.

7. The method for phased rapid construction of a water-filled bag dike according to claim 1, characterized in that, When constructing multiple bag sections continuously, the initial linear construction is completed section by section in the following order: the previous bag is inflated and pre-fixed, the next bag is inflated and pre-formed, the ends of adjacent bags are aligned, overlapped and locked, reinforcement parts are pre-installed, and water is filled in stages.

8. The method for phased rapid construction of a water-filled bag dike according to claim 1, characterized in that, After the bag reaches the predetermined water-filled state, check the bag's axial position, end connection status, reinforcement tension status, and bottom seepage prevention status. If the inspection finds that the end connection is warped or there are leakage-sensitive parts at the bottom, add ballast sandbags, seepage-proof cloth, edge strips, or flexible sealing materials.

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