Method for rescuing high-water-level seepage damage of dam in flood season on upstream face

Abstract

The invention provides a method for rescuing high-water-level seepage failure of a dam in a flood season on an upstream face, and relates to the technical field of dam protection equipment. A method for high-water-level seepage failure of an upstream face rescue dam in the flood season comprises rescue coiled materials and a laying cart, heavy waterproof zippers are arranged on the two sides of the rescue coiled materials, the rescue coiled materials comprise a surface layer and a bottom layer, and a plurality of partition plates are arranged between the surface layer and the bottom layer; the interior of the emergency coiled material is divided into a plurality of small bins which are communicated with one another and separated from one another by the partition plates, and after laying is finished, the water-absorbent resin quickly absorbs water and expands, so that the coiled material forms a certain weight and can be tightly attached to a dam body, and the situation that color strip cloth, geomembranes and the like are too light in mass and are easily washed away by water flow in a traditional treatment mode, and the service life of the coiled material is prolonged can be effectively avoided. An effective fixing method and sufficient stability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of dam protection equipment, in particular to a method for protecting a dam from high water level seepage damage during flood season on a water-facing surface. Background Art

[0002] High water level increases the water head difference on the infiltration path, which leads to a steeper infiltration gradient. Specifically, the water head difference on the infiltration path also increases. The infiltration gradient refers to the ratio of the change in water head height to the infiltration distance during the advancement of infiltration water in the soil. Under high water level conditions, the infiltration gradient becomes larger and the infiltration flow rate increases. When the infiltration gradient exceeds the allowable infiltration gradient of the weak permeable layer on the surface of the foundation, infiltration damage will occur near the downstream foot of the embankment, forming diffuse infiltration, piping or soil flow. The emergency protection strategy for this type of dike danger is mainly to "intercept seepage near the water and guide seepage away from the water". Among them, seepage interception on the water side of the dam refers to measures taken on the water side of the dam (the side close to the water flow) to reduce or prevent water from seeping through the dam. Common methods of seepage interception on the water side include using impermeable materials, such as geomembranes, clay soils or colored strips of cloth, to intercept the infiltration entrance and reduce the amount of seepage. Through seepage interception measures, water can be reduced or prevented from infiltrating from the water side of the dam to the back side of the water, preventing damage to the dam due to excessive seepage pressure. Compared with backwater seepage diversion, this type of rescue method can reduce the amount of seepage from the source, and the rescue effect is obvious, but there are also the following difficulties: 1. Difficulty in underwater operations: It is very difficult to rescue underwater pipe bursts because the underwater environment is complex, visibility is low, operations are difficult, and specific techniques and equipment are required.

[0003] 2. Restrictions on construction conditions: Under high water levels or flood season conditions, construction conditions are harsh, construction is difficult, and time is tight, requiring rapid and effective implementation of emergency measures.

[0004] Small working surface and fast water flow: Working on the narrow dam width and facing fast water flow at the same time brought great challenges to the construction. 3. Wind and wave impact: The soil on the water slope of the embankment is washed away due to the impact of wind and waves, which will affect the laying and fixing of the waterproof colored strips. Measures need to be taken to reduce the impact of wind and waves on the embankment.

[0005] 4. High technical requirements: The laying and fixing of colored strips requires certain technology to ensure that they can play a correct role and prevent floods from eroding the embankment.

[0006] 5. Fixation and stability: The color strip cloth is light in weight and needs to be fixed on the embankment to prevent it from being washed away by the water flow. This requires an effective fixing method and sufficient stability. Summary of the invention

[0007] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a method for protecting the water-facing surface of the embankment from high water level seepage damage during the flood season, which solves the problem that excess lubricating oil cannot be well recovered, which not only easily contaminates the chain but also causes a waste of resources.

[0008] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for protecting the water-facing surface of a dam from high water level seepage damage during the flood season, comprising a rescue coil and a laying cart, heavy-duty waterproof zippers are arranged on both sides of the rescue coil, the rescue coil comprises a surface layer and a bottom layer, a plurality of partitions are arranged between the surface layer and the bottom layer, the plurality of partitions divide the interior of the rescue coil into a plurality of interconnected but separate small bins, each of the small bins is filled with a water-absorbing resin, the laying cart comprises a support rod and two connecting rods, the two connecting rods are positioned at the same horizontal height, the support rod is positioned above the two connecting rods, both ends of the connecting rod are rotatably connected to connecting rollers, both ends of the support rod are rotatably connected to support rollers, the support rollers are connected to the connecting rollers on both sides thereof through a connecting frame, and the rescue coil is wound around the outer surface of the support rod.

[0009] Preferably, the method for protecting the water-facing surface of an earthen dam from high water level seepage damage during the flood season comprises the following steps: (1) In the field of dam protection equipment technology: Before laying, clear away branches and debris within the laying range of the waterside slope. The length of the emergency roll along the slope should be 1m longer than the length up the slope. Lay along the axis of the embankment. The width depends on the degree of seepage damage caused by pipe gushing, diffuse infiltration, etc. on the back slope of the embankment. It needs to exceed the dangerous section by 5 to 10m on both sides. (2) In the field of dam protection equipment technology: the dam top is cut by excavators, which may not be necessary if time is tight; (3) The technical field of dam protection equipment: a laying cart with emergency rolls rolled on it is rolled down from the top of the dam slope to unfold during laying. The starting end of the emergency roll is controlled by an onshore operating machine. When the laying cart moves to the bottom of the dam, it is left to stand still until the absorbent resin filled in the small bin absorbs water and expands rapidly, so that the roll has a certain weight and can fit tightly to the dam body. When a heavy-duty waterproof zipper is laying another piece of emergency roll, the traction device of the zipper head is arranged on the laying cart and automatically closes after the cart rolls down.

[0010] Preferably, the surface layer involves the technical field of dam protection equipment and is an impermeable material such as PE, PVC geomembrane, etc.; the bottom layer involves the technical field of dam protection equipment and is a one-cloth-one-membrane composite geomembrane, the geomembrane provides waterproofness, and the geotextile provides anti-puncture performance and dimensional deformation resistance stability.

[0011] Working principle: When in use, before laying, clean up the branches and debris within the laying range of the waterside slope. The length of the rescue coil along the slope should be 1m longer than the length of the slope. It is laid along the axis of the embankment. The width depends on the degree of seepage damage such as pipe gushing and seepage on the back slope of the embankment. It needs to exceed 5 to 10m on both sides of the dangerous section. The top of the embankment is cut by an excavator. If time is tight, it is not necessary. The laying cart with the rescue coil rolled up will be rolled down from the top of the embankment slope during laying. The starting end of the rescue coil is controlled by the onshore operating machine. When the laying cart moves to the bottom of the embankment, it is left still until the water-absorbing resin filled in the small warehouse absorbs water and expands rapidly, so that the coil forms a certain weight and can fit tightly with the dam body. At this time, the onshore workers can close the heavy-duty waterproof zipper by pulling the rope.

[0012] (III) Beneficial effects The present invention provides a method for protecting the water-facing surface of a dam from high water level seepage damage during the flood season. It has the following beneficial effects: 1. This method of rescuing the water-facing surface of earthen dams damaged by high water level infiltration during the flood season does not need to worry about underwater visibility and difficulty of operation when working in places with turbulent water flow. The equipment and technology required are relatively mature. Even when working on a narrow dam width, it can be carried out quickly, while improving the safety factor of the operation.

[0013] 2. This method of protecting the water-facing surface of earthen dams damaged by high water level infiltration during the flood season is that after laying, the water-absorbing resin quickly absorbs water and expands, so that the roll material has a certain weight and can fit tightly to the dam body. This can effectively avoid the traditional treatment method where the colored cloth is too light and easily washed away by the water flow, thereby improving the effective fixing method and sufficient stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the emergency rescue coiled material of the present invention; Figure 2 It is a structural schematic diagram of the emergency rescue coil of the present invention; Figure 3 It is a structural schematic diagram of the laying cart of the present invention; Figure 4 A top view of the cart laid out for the present invention; Figure 5 It is a side view of the dam after slope cutting according to the present invention.

[0015] Among them, 1. surface layer; 2. heavy-duty waterproof zipper; 3. partition plate; 4. bottom layer; 5. water-absorbent resin; 6. connecting roller; 7. connecting frame; 8. support roller; 9. support rod; 10. connecting rod. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example:

[0017] like Figure 1-5 As shown, an embodiment of the present invention provides a method for protecting a water-facing surface from high water level seepage damage in a flood season, comprising a rescue roll and a laying cart, heavy-duty waterproof zippers 2 are arranged on both sides of the rescue roll, the rescue roll comprises a surface layer 1 and a bottom layer 4, a plurality of partition plates 3 are arranged between the surface layer 1 and the bottom layer 4, the plurality of partition plates 3 divide the interior of the rescue roll into a plurality of interconnected but separate small bins, each of which is filled with a water-absorbing resin 5, the laying cart comprises a support rod 9 and two connecting rods 10, the two connecting rods 10 are positioned at the same horizontal height, the support rod 9 is positioned above the two connecting rods 10, both ends of the connecting rod 10 are rotatably connected to connecting rollers 6, both ends of the support rod 9 are rotatably connected to supporting rollers 8, the supporting rollers 8 are connected to the connecting rollers 6 on both sides thereof through a connecting frame 7, and the rescue roll is wound on the outer surface of the support rod 9.

[0018] Before laying, clean up the branches and debris within the laying range of the waterside slope. The length of the rescue coil along the slope should be 1m longer than the length of the slope. It is laid along the axis of the embankment. The width depends on the degree of seepage damage such as pipe gushing and seepage on the back slope of the embankment. It needs to exceed 5 to 10m on both sides of the dangerous section. The top of the embankment is cut by an excavator. If time is urgent, it is not necessary. The laying cart with the rescue coil rolled on it will be rolled down from the top of the embankment slope during laying. The starting end of the rescue coil is controlled by the onshore operating machine. When it moves to the bottom of the dam, it remains still until the absorbent resin filled in the small bin absorbs water and expands rapidly, so that the roll material forms a certain weight and can fit tightly to the dam body. When the heavy-duty waterproof zipper 2 is laying another rescue roll material, the traction device of the zipper head is arranged on the laying cart, and automatically closes after the cart rolls down; the surface layer 1 is impermeable materials such as PE and PVC geomembranes; the bottom layer 4 is a composite geomembrane of one cloth and one membrane, the geomembrane provides waterproofness, and the geotextile provides anti-puncture performance and dimensional anti-deformation stability.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for protecting the water-facing surface of a dam from high water level seepage damage during the flood season, comprising a rescue coil and a laying cart, characterized in that: Heavy-duty waterproof zippers (2) are provided on both sides of the rescue coiled material. The rescue coiled material comprises a surface layer (1) and a bottom layer (4). A plurality of partition plates (3) are provided between the surface layer (1) and the bottom layer (4). The plurality of partition plates (3) divide the interior of the rescue coiled material into a plurality of interconnected but separate small compartments. Each of the small compartments is filled with a water-absorbing resin (5). The laying cart comprises a support rod (9) and two connecting rods (10). The two connecting rods (10) are located at the same horizontal height. The support rod (9) is located above the two connecting rods (10). The two ends of the connecting rod (10) are rotatably connected to connecting rollers (6). The two ends of the support rod (9) are rotatably connected to supporting rollers (8). The supporting rollers (8) are connected to the connecting rollers (6) on both sides thereof through a connecting frame (7). The rescue coiled material is wound on the outer surface of the support rod (9).

2. The method for protecting the water-facing surface of a dam from high water level seepage damage during flood season according to claim 1, characterized in that: The following steps are included: (1) Before laying, clear away branches and debris within the laying range of the waterside slope. The length of the emergency roll along the slope should be 1m longer than the length up the slope. Lay along the axis of the embankment. The width depends on the degree of seepage damage such as pipe gushing and diffuse infiltration on the back slope of the embankment. It needs to exceed the dangerous section by 5 to 10m on both sides. (2) The top of the dam is cut by excavation, but this is not necessary if time is tight; (3) The laying cart with the rescue coiled material rolled on it is rolled down from the top of the embankment slope to unfold it during laying. The starting end of the rescue coiled material is controlled by the onshore operating machine. When the laying cart moves to the bottom of the embankment, it is left to stand still until the absorbent resin filled in the small bin absorbs water and expands rapidly, so that the coiled material has a certain weight and can fit tightly to the dam body. When the heavy-duty waterproof zipper (2) is laying another piece of rescue coiled material, the traction device of the zipper head is arranged on the laying cart and automatically closes after the cart rolls down.

3. The method for protecting the water-facing surface of a dam from high water level seepage damage during flood season according to claim 1, characterized in that: The surface layer (1) is made of impermeable materials such as PE and PVC geomembranes; the bottom layer (4) is a geomembrane composed of a cloth and a film, wherein the geomembrane provides waterproofing and the geotextile provides puncture resistance and dimensional deformation resistance stability.

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