Pile planting treatment structure for dam seepage damage

Abstract

The utility model relates to a dam seepage failure pile planting treatment structure which is used for blocking a seepage channel in a dam, the dam seepage failure pile planting treatment structure comprises a plurality of profile steel piles, a plurality of steel sheet piles, a coarse sand inverted filter layer and a rock ballast backfill body, the profile steel piles are arranged in the dam in the gravity direction, and the coarse sand inverted filter layer is arranged in the rock ballast backfill body. The multiple profile steel piles are arranged at intervals in the length direction of the dam; the steel sheet piles are arranged in the dam in the gravity direction, the steel sheet piles are located on the upstream sides of the profile steel piles and are close to the profile steel piles, the multiple steel sheet piles are sequentially arranged in the length direction of the dam and form a plugging face, and the plugging face can shield the cross section of the permeation channel; the coarse sand inverted filter layer and the rock ballast backfill body are located on the outlet side of the permeation channel and block the outlet of the permeation channel, and the coarse sand inverted filter layer and the rock ballast backfill body are laid in sequence after being locally excavated at the outlet of the permeation channel. The pile planting disposal structure for the dam seepage damage can avoid the shortage of lifting protection and reduce the water damage loss.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dam maintenance, in particular to a dam seepage failure pile planting treatment structure. BACKGROUND

[0002] Due to the quality of the dam itself or biological invasion, long-term disrepair, etc., seepage failure often occurs during sudden floods and gradually expands, eventually leading to the deficiency of the dam, which may cause damage to surrounding towns and villages and endanger people's life and property safety. Statistical data shows that seepage failure is an important reason for the failure of the dam. CONTENT OF THE INVENTION

[0003] The first aspect of the present application provides a dam seepage failure pile planting treatment structure, which can perform emergency treatment on the dam during seepage failure, thereby avoiding the deficiency and reducing water damage.

[0004] The dam seepage failure pile planting treatment structure provided by the first aspect of the present application is used to plug the seepage channel inside the dam, and specifically comprises:

[0005] A profile steel pile is arranged in the dam along the gravity direction, the number of the profile steel piles is multiple, and the multiple profile steel piles are arranged along the length direction of the dam at intervals;

[0006] A steel sheet pile is arranged in the dam along the gravity direction, the steel sheet pile is located on the upstream side of the profile steel pile and close to the profile steel pile, the number of the steel sheet piles is multiple, and the multiple steel sheet piles are arranged along the length direction of the dam at intervals and form a plugging surface, the plugging surface can shield the cross section of the seepage channel;

[0007] A coarse sand filter layer and a stone residue backfill body are located on the outlet side of the seepage channel and plug the outlet of the seepage channel, and the coarse sand filter layer and the stone residue backfill body are sequentially laid after local excavation at the outlet of the seepage channel.

[0008] In addition, the dam seepage failure pile planting treatment structure provided by the present application can also have the following additional technical features:

[0009] In an optional scheme, the dam seepage failure pile planting treatment structure further comprises a backfill coarse sand layer and at least one drill hole, the drill hole is located on the downstream side of the profile steel pile, and the drill hole extends downward from the top of the dam and communicates with the seepage channel, and the backfill coarse sand layer is filled in the drill hole and the seepage channel.

[0010] In an alternative scheme, the steel sheet pile comprises a horizontal plate and two side plates, the two side plates are respectively located on both sides of the horizontal plate along the width direction, and the side plates are inclined to the horizontal plate, and the end of the horizontal plate is provided with a clamping plate, and the adjacent two steel sheet piles are arranged in a staggered manner and clamped with each other through the clamping plate.

[0011] In an alternative scheme, the horizontal plate, the side plate and the clamping plate are of an integrated structure, and the clamping plate is formed by bending the side plate; the profile steel pile is close to the horizontal plate and located at the middle position of the horizontal plate.

[0012] In an alternative scheme, the profile steel pile is arranged on the upstream side of the dam center line, the profile steel pile is an I-beam and / or a square tube steel, and the spacing between the adjacent two profile steel piles is substantially equal to the width of the steel sheet pile.

[0013] In an alternative scheme, the profile steel pile and the steel sheet pile have a first depth in the dam, and at the first depth, the bottom of the profile steel pile and the steel sheet pile is 2-3m lower than the outlet of the infiltration channel.

[0014] In an alternative scheme, the steel sheet pile has a second depth in the dam, the second depth is greater than the first depth, and when the steel sheet is located at the first depth and the leakage amount of the infiltration channel is lower than the expected value, the steel sheet pile is moved from the first depth to the second depth.

[0015] The second aspect of the application provides a construction method of a dam infiltration damage pile planting treatment structure, which is used for constructing the dam infiltration damage pile planting treatment structure provided in the first aspect, and comprises the following steps:

[0016] 1) According to the outlet position of the infiltration channel on the downstream side of the dam, the longitudinal range of the infiltration channel is preliminarily determined, the planting arrangement range is expanded by about 5m to both sides respectively, the arrangement points of the profile steel pile are determined with the width of the steel sheet pile as the spacing;

[0017] 2) The profile steel pile is punched from both sides to the middle, and the welding or bolt riveting is used between each profile steel pile;

[0018] 3) The steel sheet pile is punched immediately after the profile steel pile, and the downstream leakage is observed in time during this process;

[0019] 4) The downstream leakage outlet area is locally excavated, and the coarse sand filter layer and the stone backfill body are backfilled in turn;

[0020] 5) The next processing mode is determined according to the properties of the leakage channel exposed after excavation:

[0021] When the leakage channel is in a dispersed fissure state, the embankment reinforcement treatment is carried out after the flood;

[0022] When the leakage channel is in a cavity state, drilling is carried out from the dam top, and a backfill coarse sand layer is injected to fill the cavity, so as to avoid the cavity from further expanding to cause the embankment top to collapse.

[0023] The beneficial effects of the present application are:

[0024] The embankment seepage damage pile planting treatment structure and the construction method in the present application seal the seepage channel by the combination of the profile steel pile and the steel sheet pile. The steel sheet pile has the advantages of fast construction speed and good anti-seepage effect. Compared with the traditional upstream throwing and filling sealing, the positioning is more accurate, and the sealing effect is better. In addition, the profile steel pile has the advantages of small cross-sectional area and small water flow impact force, which can effectively reduce the deviation of the pile body when penetrating through the leakage cavity, form a support pile body for the steel sheet pile, and have higher construction reliability and more extensive seepage channels. The embankment seepage damage pile planting treatment structure can also solve the problem of excessive water supply overtopping through the exposed pile body, and one measure can solve the risk of multiple damage of the embankment during the flood.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The arrangement schematic diagram of the embankment seepage damage pile planting treatment structure provided by the present application is shown;

[0027] Figure 2 The plane arrangement schematic diagram of the profile steel pile and the steel sheet pile provided by the present application is shown;

[0028] Figure 3 The structure schematic diagram of the sheet pile in a specific embodiment provided by the present application is shown.

[0029] Reference signs: embankment 1, seepage channel 2, profile steel pile 3, steel sheet pile 4, transverse plate 41, side plate 42, clamping plate 43, coarse sand filter layer 5, stone residue backfill body 6, drilling hole 7, backfill coarse sand layer 8.

[0030] The accompanying drawings are incorporated into the specification and form a part of the specification, show embodiments consistent with the present application, and together with the specification serve to explain the principles of the present application. DETAILED DESCRIPTION

[0031] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0032] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0035] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0036] like Figures 1-3 As shown, the first aspect of this application provides a pile-planting treatment structure for seepage damage in dams. This pile-planting treatment structure is used to seal seepage channels inside dams, and is particularly suitable for emergency sealing and rescue during seepage damage in dams.

[0037] Specifically, the pile-planting structure for treating seepage damage to the dam includes steel piles 3, sheet piles 4, a coarse sand filter layer 5, and a stone backfill 6. The steel piles 3 are installed within the dam 1 along the direction of gravity, with multiple steel piles 3 spaced apart along the length of the dam 1. The sheet piles 4 are also installed within the dam 1 along the direction of gravity, located upstream of and close to the steel piles 3. Multiple sheet piles 4 are arranged sequentially along the length of the dam 1, forming a sealing surface that can block the cross-section of the seepage channel 2. The coarse sand filter layer 5 and the stone backfill 6 are located on the outlet side of the seepage channel 2 and seal the outlet. The coarse sand filter layer 5 and the stone backfill 6 are laid sequentially after partial excavation at the outlet of the seepage channel 2.

[0038] The dam seepage failure pile planting treatment structure in the embodiment blocks the seepage channel 2 by the combination of the steel pile 3 and the steel sheet pile 4. The steel sheet pile 4 has the advantages of fast construction speed and good seepage prevention effect. Compared with the traditional upstream throwing and filling plugging, the positioning is more accurate, and the plugging effect is better. In addition, in order to reduce the problem that the water flow impact causes the steel sheet pile 4 to deviate or even cannot be piled when the steel sheet pile 4 penetrates the leakage cavity, the steel pile 3 has the advantages of small cross-sectional area and small water flow impact force, which can effectively reduce the deviation of the pile body when penetrating the leakage cavity, form a support pile body of the steel sheet pile 4, and has higher construction reliability and wider adaptability to seepage channels. The dam seepage failure pile planting treatment structure can also solve the problem of excessive water supply overtopping by exposed pile body, and one measure can solve the risk of multiple dam failures during floods.

[0039] As shown in Figure 1 In a specific embodiment, the dam seepage failure pile planting treatment structure further comprises a backfilling coarse sand layer 8 and at least one drill hole 7. The drill hole 7 is located on the downstream side of the steel pile 3, and the drill hole 7 extends downward from the top of the dam 1 and communicates with the seepage channel 2. The backfilling coarse sand layer 8 is filled in the drill hole 7 and the seepage channel 2. When the seepage channel 2 forms a cavity that may cause the dam body to collapse, the cavity is filled by providing the drill hole 7 on the downstream side of the steel sheet pile 4 and filling the backfilling coarse sand layer 8. Generally, the number of drill holes 7 can be determined according to the seepage failure of the dam 1, which is not limited herein.

[0040] As shown in Figures 2-3 In a specific embodiment, the steel sheet pile 4 comprises a horizontal plate 41 and two side plates 42. The two side plates 42 are respectively located on both sides of the horizontal plate 41 in the width direction, and the side plates 42 are inclined to the horizontal plate 41. The end of the horizontal plate 41 is provided with a clamping plate 43. The adjacent two steel sheet piles 4 are arranged in a staggered manner and clamped to each other by the clamping plate 43. Specifically, the horizontal plate 41, the side plate 42 and the clamping plate 43 are an integral structure, and the clamping plate 43 is formed by bending the side plate 42. It should be noted that the steel sheet pile 4 should be selected as a model with a larger width as far as possible. When arranged, the steel sheet pile 4 should be arranged on the upstream side of the steel pile 3, and as close as possible to the middle position of the steel pile 3.

[0041] As shown in Figures 1-2 In a specific embodiment, the steel pile 3 can adopt I-beam or square tube steel. The steel pile 3 is arranged on the upstream side of the dam top center line. According to the estimated range of the seepage channel 2, the arrangement is appropriately enlarged on both sides. The longitudinal arrangement spacing is corresponding to the width of the steel sheet pile 4, and the steel sheet pile 4 is arranged in a staggered manner according to the size of the steel sheet pile 4.

[0042] In a specific embodiment, the first setting depth of the steel pile 3 and the steel sheet pile 4 is determined according to the elevation of the outlet of the seepage passage 2. If the first setting depth of the steel pile 3 and the steel sheet pile 4 in the dam 1 is defined as the first depth, then at the first depth, the bottom of the steel pile 3 and the steel sheet pile 4 is 2-3 m lower than the outlet of the seepage passage 2. In addition, the steel sheet pile 4 has a second depth in the dam 1, and the second depth is greater than the first depth. When the steel sheet pile 4 is at the first depth and the seepage amount of the seepage passage 2 is lower than expected (e.g., the seepage amount does not decrease significantly), the setting depth is further increased, i.e., the steel sheet pile 4 is set from the first depth to the second depth.

[0043] As shown in Figure 1 The second aspect of the embodiments of the present application provides a construction method of a dam seepage failure pile planting treatment structure. The construction method is used to construct the dam seepage failure pile planting treatment structure provided in the first aspect of the embodiments. The construction method includes the following steps:

[0044] 1) According to the outlet position of the seepage passage 2 on the downstream side of the dam 1, the longitudinal range of the seepage passage 2 is preliminarily determined, and the planting arrangement range is expanded by about 5 m on both sides respectively. The arrangement points of the steel pile 3 are determined with the width of the steel sheet pile 4 as the interval.

[0045] 2) The steel pile 3 is set from both sides to the middle, and the steel pile 3 between each section is riveted by welding or bolts.

[0046] 3) The steel sheet pile 4 is set immediately after the steel pile 3. The downstream seepage condition needs to be observed in time during this process.

[0047] 4) The downstream seepage outlet area is locally excavated, and the coarse sand filter layer 5 and the stone backfill body 6 are backfilled in turn.

[0048] 5) The next treatment method is determined according to the properties of the seepage passage revealed after excavation:

[0049] When the seepage passage is in a dispersed fissure state, the dam body is reinforced after the flood.

[0050] When the seepage passage is in a cavity state, the drill hole 7 is drilled from the dam top, the cavity is filled with the coarse sand backfill layer 8, and the cavity is prevented from further expanding to cause the dam top to collapse.

[0051] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A seepage failure embankment pile-planting treatment structure for plugging a seepage passage inside an embankment, characterized by, include: Steel piles are installed in the dam along the direction of gravity, and there are multiple steel piles, which are spaced apart along the length of the dam. Sheet piles are installed in the dam along the direction of gravity. The sheet piles are located upstream of and close to the steel piles. There are multiple sheet piles, which are arranged sequentially along the length of the dam to form a sealing surface. The sealing surface can block the cross-section of the seepage channel. The coarse sand filter layer and the stone slag backfill are located on the outlet side of the infiltration channel and seal the outlet of the infiltration channel. The coarse sand filter layer and the stone slag backfill are laid in sequence after the outlet of the infiltration channel is partially excavated.

2. The embankment seepage failure pil ing treatment structure of claim 1, wherein, The dam seepage damage pile treatment structure also includes a backfill coarse sand layer and at least one borehole. The borehole is located downstream of the steel pile and extends downward from the top of the dam and communicates with the seepage channel. The backfill coarse sand layer is filled in the borehole and the seepage channel.

3. The pile-planting treatment structure for seepage damage in dams according to claim 1 or 2, characterized in that, The sheet pile includes a horizontal plate and two side plates. The two side plates are located on both sides of the horizontal plate along the width direction and are inclined to the horizontal plate. The ends of the horizontal plate are provided with snap-fit ​​plates. Adjacent sheet piles are staggered and snap-fitted to each other through the snap-fit ​​plates.

4. The pile-planting treatment structure for seepage damage in dams according to claim 3, characterized in that, The horizontal plate, the side plate, and the snap-fit ​​plate are an integral structure, and the snap-fit ​​plate is formed by bending the side plate; the steel pile is close to the horizontal plate and located in the middle of the horizontal plate.

5. The pile-planting treatment structure for seepage damage in dams according to claim 3, characterized in that, The steel piles are arranged on the upstream side of the centerline of the dam. The steel piles are I-beams and / or square tubes. The spacing between two adjacent steel piles is approximately equal to the width of the sheet piles.

6. The dam seepage damage pile treatment structure according to any one of claims 1-2 or 4-5, characterized in that, The steel piles and sheet piles have a first depth within the dam, and at the first depth, the bottom of the steel piles and sheet piles is 2-3m lower than the outlet of the seepage channel.

7. The pile-planting treatment structure for seepage damage in dams according to claim 6, characterized in that, The sheet pile has a second depth within the dam, which is greater than the first depth. When the sheet pile is located at the first depth and the leakage of the seepage channel is lower than expected, the sheet pile moves down from the first depth to the second depth.

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