Dike seepage damage plugging structure

Abstract

The utility model discloses a dike seepage damage blocking structure, which relates to the technical field of dike blocking and comprises a dike located on the bank side of an original river channel, a seepage channel and a harmful crack which are formed by flood seepage damage are arranged in the dike, and a cofferdam is arranged at the downstream position of the seepage channel and the harmful crack. The dam is used for blocking and reinforcing the permeation channel in the mode of upstream blocking and backfilling and downstream dam body ridging. The downstream water level is raised by adopting the downstream cofferdam, so that the permeation gradient of the permeation channel of the embankment body is reduced, the permeation gradient is gradually reduced and the permeation failure effect is gradually weakened along with the lifting of the downstream cofferdam, the short-term safety of the embankment body is remarkably improved, the short-term deficiency of the embankment body due to the expansion of the permeation failure in the short term is avoided, and the service life of the embankment body is prolonged. And meanwhile, more favorable conditions are created for upstream throwing, filling and plugging.

Description

Technical Field

[0001] The utility model relates to the technical field of dam sealing, in particular to a dam seepage damage sealing structure. Background Art

[0002] my country has a wide range of rivers, with a large number of towns and villages distributed along the rivers. To ensure the safety of towns and villages in terms of flood control, embankments are generally used to raise and protect the river channels. Due to the quality of the embankments themselves, biological invasions, disrepair, and other factors, seepage damage often occurs during sudden floods and gradually expands, eventually leading to the lack of embankments, causing damage to surrounding towns and villages, and endangering people's lives and property. When seepage damage occurs in embankments, temporary sealing is generally carried out by dumping slag and sand bags from upstream, or by excavating and backfilling the outlet of the leakage channel downstream for filtration and slag pressure. However, these two traditional emergency sealing methods have major flaws, and it is common for the sealing to fail, leading to the further development of the seepage channel and even the embankment to burst.

[0003] The existing plugging methods have poor upstream plugging effectiveness due to the uncertainty of the infiltration channel. It is necessary to expand the range of slag and sandbag filling. At the same time, the filling materials are lost due to the impact of river water, resulting in low plugging efficiency. There is also a risk of the infiltration channel continuing to expand during the plugging period. Utility Model Content

[0004] In order to improve the problems in the above-mentioned existing blocking methods, in which the upstream blocking method has poor blocking effectiveness due to the uncertainty of the seepage channel, it is necessary to expand the filling range of slag and sandbags, and at the same time the filling materials are lost due to the impact of river water, resulting in low blocking efficiency and the risk of the seepage channel continuing to expand during the blocking period. The utility model provides a embankment seepage damage blocking structure.

[0005] The utility model provides a dike seepage damage blocking structure, comprising a dike located on the bank of an original river channel, wherein a seepage channel and hazardous cracks formed by flood seepage damage are opened in the dike, and a cofferdam is provided at the downstream portion of the seepage channel and the hazardous cracks. The dike is used to block and reinforce the seepage channel by adopting a method of upstream blocking backfilling and downstream dike body earthing.

[0006] Optionally, in the above-mentioned dike seepage damage blocking structure, the cofferdam is arranged at the outlet of the downstream seepage channel and the hazardous crack, and the cofferdam is formed by filling and stacking sandbags.

[0007] Optionally, in the above-mentioned embankment seepage damage blocking structure, the top width of the cofferdam is not less than 1m, and the slope of the upstream side of the cofferdam is 1:1~1:1.5, and the slope of the downstream side of the cofferdam is 1:2.

[0008] Optionally, in the above-mentioned embankment seepage damage blocking structure, the height of the cofferdam is less than 5m, and the top height is flush with or higher than the river water level.

[0009] Optionally, in the above-mentioned dike seepage damage blocking structure, the upstream blocking backfill is composed of dumping bodies such as large stones and sandbags and upstream clay dumping bodies.

[0010] Optionally, in the above-mentioned dike seepage damage blocking structure, the downstream dike body soiling from upstream to downstream is respectively clay bag, medium-coarse sand filter layer, and slag backfill material, and all of them are formed by underwater dumping.

[0011] Optionally, in the above-mentioned dike seepage damage blocking structure, a plurality of fishing nets are arranged downstream of the cofferdam along the transverse direction of the water flow to block the cofferdam, and both ends of the fishing nets are fixed to the original ground by wooden stakes.

[0012] In summary, the present invention has at least one of the following beneficial effects:

[0013] By using the downstream cofferdam to raise the water level downstream, the seepage gradient of the seepage channel of the embankment is reduced. As the downstream cofferdam is raised, the seepage gradient gradually decreases and the seepage damage effect gradually weakens, significantly improving the short-term safety of the embankment and avoiding the short-term damage of the embankment due to the expansion of seepage damage. At the same time, more favorable conditions are created for upstream dumping and plugging.

[0014] The flat terrain downstream of the embankment disperses the water flow. After the water flow is dispersed, the impact of the water flow per unit width is significantly reduced. In addition, the water depth is shallow, making the construction of the downstream cofferdam underwater less difficult and easier to implement.

[0015] By utilizing the high water level of the downstream cofferdam and the sealing effect of the upstream fill, the leakage water volume and flow rate can be effectively controlled. The relatively gentle water flow in the downstream cofferdam is effectively sealed through the layered fill, ensuring the safety of the embankment during the flood season. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a plan layout diagram of the utility model;

[0017] Figure 2 It is a typical structural diagram of the utility model.

[0018] In the figure: 1. Levee; 2. Infiltration channel; 3. Hazardous cracks; 4. Cofferdam; 5. Upstream plugging and backfilling; 6. Downstream embankment earthing; 601. Clay bag; 602. Medium-coarse sand filter layer; 603. Slag backfill. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-2 The utility model is described in further detail.

[0020] Please refer to the attached figure in the instruction manual Figure 1-2 The utility model provides an embodiment: a dike seepage damage blocking structure, comprising a dike 1 located on the bank of the original river channel, and the terrain downstream of the original river channel is higher than the terrain of the riverbed, and there are infiltration channels 2 and dangerous cracks 3 formed by flood seepage damage in the dike 1, and a cofferdam 4 is provided at the downstream part of the infiltration channel 2, and the cofferdam 4 is provided at the outlet of the downstream infiltration channel 2 and the dangerous crack 3, and the cofferdam 4 is filled and stacked with sandbags; the top width of the cofferdam 4 is not less than 1m, and the slope of the upstream side of the cofferdam 4 is 1:1~1:1.5, and the slope of the downstream side of the cofferdam 4 is 1:2; the height of the cofferdam 4 is less than 5m, and the top height of the cofferdam 4 is flush with or higher than the river water level.

[0021] Several fishing nets are set up along the horizontal direction of the water flow downstream of the cofferdam 4 to block the cofferdam 4. The two ends of the fishing nets are fixed to the original river channel by wooden stakes. Other similar lightweight flexible nets with strong tensile strength can also be used. The fishing nets can be used to reduce the possibility of the cofferdam 4 being washed away by the water flow during the construction process, especially when the cofferdam 4 is closed.

[0022] The dam 1 is used to block and reinforce the infiltration channel 2 by adopting upstream blocking backfill 5 and downstream embankment earthwork 6. The upstream blocking backfill 5 is composed of large stones, sandbags and other fill materials and upstream clay fill materials; the downstream embankment earthwork 6 is composed of clay bags 601, medium-coarse sand filter layer 602, and slag backfill 603 from upstream to downstream, and all are formed by underwater fill. The backfill elevation of the slag backfill 603 is higher than the river water level and the expected warning water level. After filling above the water surface, it is compacted using a roller.

[0023] Due to the high flow velocity in the infiltration channel 2, it is difficult to achieve the blocking effect by upstream blocking. At this time, it is necessary to build a low cofferdam 4 downstream of the infiltration channel. By raising the downstream water level, the infiltration gradient and infiltration volume in the dam 1 are reduced. Then, the upstream blocking backfill 5 and downstream embankment earthing 6 are combined to block and reinforce the embankment infiltration channel, thereby ensuring flood safety.

[0024] The raw materials used in this solution can be excavated nearby and can be interchanged with each other. For example, sand bags can be used to replace clay bags 601 or clay bags 601 can be used to replace sand bags. There are no clear performance requirements for the slag backfill material 603. Although the material adjustment will affect the sealing effect, it can meet the requirements of short-term risk removal and avoid further expansion of risks.

[0025] In summary, by using sandbags and taking advantage of the terrain to build the cofferdam 4, the seepage hazard range is enclosed. When building the cofferdam 4, it is first built from the dry land on both sides to the middle. As the cofferdam 4 is built, the water level continues to rise. While the cofferdam 4 on both sides is raised, it is gradually pushed towards the middle until it is closed. After the cofferdam 4 is closed, the back of the cofferdam 4 is widened and thickened.

[0026] At the same time as the cofferdam 4 is being built, stone slag backfill 603 is dumped onto the upstream river surface for upstream plugging and backfilling 5. At the same time, clay packs 601 are dumped at the outlet of the back infiltration channel 2 and the hazardous cracks 3, with the amount of fill being twice the designed amount. Medium-coarse sand is poured from the crest of the dam 1 and manually dumped onto the back of the clay packs 601, with the amount of fill being 1.5 times the designed amount. Taking into account the small natural angle of repose underwater and the driving effect of the water flow, the sand is deposited on the surface of the clay packs 601, forming a medium-coarse sand filter layer 602.

[0027] Finally, a dump truck is used to directly transport the slag backfill material 603 to backfill the water pit formed by the cofferdam 4 until it is full and exceeds the upstream flood level or the predicted warning water level, and then a roller is used to compact the slag backfill material 603.

[0028] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dike seepage damage blocking structure, comprising a dike (1) located on the bank of an original river channel, wherein the dike (1) has a seepage channel (2) and a hazardous crack (3) formed by flood seepage damage, and is characterized by: A cofferdam (4) is provided at the downstream portion of the infiltration channel (2) and the hazardous crack (3), and the embankment (1) is used to block and reinforce the infiltration channel (2) by adopting upstream blocking and backfilling (5) and downstream embankment body earthing (6).

2. The dike seepage damage blocking structure according to claim 1, characterized in that: The cofferdam (4) is arranged at the outlet of the downstream infiltration channel (2) and the hazardous crack (3), and the cofferdam (4) is formed by filling and stacking sandbags.

3. The dike seepage damage blocking structure according to claim 2, characterized in that: The top width of the cofferdam (4) is not less than 1 m, and the slope of the upstream side of the cofferdam (4) is 1:1~1:1.5, and the slope of the downstream side of the cofferdam (4) is 1:

2.

4. The dike seepage damage blocking structure according to claim 3, characterized in that: The height of the cofferdam (4) is less than 5m, and the top height is flush with or higher than the river water level.

5. The dike seepage damage blocking structure according to claim 1, characterized in that: The upstream plugging backfill (5) is composed of large rocks, sand bags and other dumping bodies and upstream clay dumping bodies.

6. The dike seepage damage blocking structure according to claim 1, characterized in that: The downstream embankment earthwork (6) comprises a clay bag (601), a medium-coarse sand filter layer (602), and a slag backfill (603) from upstream to downstream, and all are formed by underwater dumping.

7. The dike seepage damage blocking structure according to claim 1, characterized in that: A plurality of fishing nets are arranged downstream of the cofferdam (4) along the transverse direction of the water flow to block the cofferdam (4), and both ends of the fishing nets are fixed to the original ground through wooden stakes.

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