Assembled plastic steel sheet pile structure for dam piping treatment and using method of assembled plastic steel sheet pile structure

Abstract

The invention relates to the technical field of dam piping treatment, in particular to an assembled plastic steel sheet pile structure and a using method. The structure comprises at least one group of plastic steel sheet piles which are arranged in an embankment foundation on the backwater side of an embankment body, and the first group of plastic steel sheet piles are located between a piping outlet and the embankment body to cut off a piping channel. The plastic steel plate piles are assembled through mortise and tenon structures, tenons and tenon buckles are connected in a matched mode, and supporting bases with inserting plates are arranged to assist in vertical installation. The surface of the embankment foundation is covered with a permeable filter layer and an inverted filter layer, the permeable filter layer is made of geotechnical cloth, and the inverted filter layer is composed of a fine gravel layer and an overlying coarse gravel layer. The using method comprises the steps that an original piping outlet is positioned, and the first set of sheet piles are inserted; according to water seepage and sand carrying conditions, inserting subsequent sheet piles between the first group of sheet piles and the dike body in a progressive increase manner; if a new outlet appears, the insertion direction and depth of the sheet pile are adjusted according to the outlet position. The seepage path is prolonged by inserting the sheet piles with different depths in a graded mode, the filtering layer is matched for intercepting gravel, and the problem that traditional treatment efficiency is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dam piping treatment, and in particular to an assembled plastic-steel sheet pile structure for dam piping treatment and a use method thereof. Background Art

[0002] Piping hazards at dams are often caused by complex stratum conditions at the base of the dam. Under the action of seepage, fine soil particles are washed out by the water flow, forming piping channels. This phenomenon develops rapidly and can lead to dam failure if not addressed in a timely manner. Current disposal mainly relies on artificial filling of sand and gravel materials, which is inefficient and consumes a lot of resources. In addition, traditional methods are difficult to quickly form effective seepage interception paths, cannot adapt to changes in pipe burst channels at different depths, and on-site operations are time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the existing technology that it is difficult to quickly form an effective seepage interception path and cannot adapt to the changes in piping channels of different depths, and to propose an assembled plastic-steel sheet pile structure for dam piping treatment and its use method.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: An assembled plastic-steel sheet pile structure for treating dam piping includes at least one group of plastic-steel sheet piles, wherein each group of plastic-steel sheet piles comprises a plurality of plastic-steel sheet piles, the plastic-steel sheet piles being located within the dam foundation and on the backwater side of the dam body; The first group of plastic-steel sheet piles is installed between the piping outlet and the embankment to cut off the piping channel.

[0005] In a possible design, a water-permeable filter layer is further included, which is arranged on the surface of the embankment foundation and covers the plastic-steel sheet piles and the piping outlet; The reverse filter layer is arranged above the water permeable filter layer.

[0006] In one possible design, the water-permeable filter layer includes a geotextile layer.

[0007] In one possible design, the inverse filter layer includes a fine gravel layer in contact with the permeable filter layer; The coarse gravel layer is arranged above the fine gravel layer.

[0008] In a possible design, when there are multiple groups of plastic-steel sheet piles, the depth of each group of plastic-steel sheet piles inserted into the embankment foundation increases gradually in the direction away from the embankment body along the backwater side of the embankment body.

[0009] In a possible design, when there are multiple groups of plastic-steel sheet piles, the depths of the multiple groups of plastic-steel sheet piles inserted into the embankment foundation increase gradually along the backwater side of the embankment body toward the embankment body.

[0010] In a possible design, the plastic-steel sheet pile includes a plurality of detachably assembled mortise and tenon structures, wherein the mortise and tenon structures include: a tenon in the mortise and tenon structure; The web is set on one side of the tenon; The tenon buckle in the mortise and tenon structure is arranged on a side of the web away from the tenon; two adjacent mortise and tenon structures are connected by the cooperation between the tenon and the tenon buckle.

[0011] In a possible design, the plastic-steel sheet piles also include a group of support seats, and each group of support seats is provided with two, a clearance cavity is provided between the two support seats, and the clearance cavity has the same shape as the mortise and tenon connected in the two plastic-steel sheet piles, the side walls of the support seats are provided with abutment plates for supporting the surface of the embankment base, the bottom of the support seats is provided with an insert plate for inserting into the embankment base, an auxiliary plate is provided between the two support seats, and mounting holes are provided on the surface of the web and on the top of one side close to the mortise and tenon, respectively, and the support seats are fixedly connected to the mounting holes of the web by bolts.

[0012] A method for using an assembled plastic-steel sheet pile structure for treating dam piping comprises the following steps: S1. Obtain the location of the piping outlet of the original dam, and insert a first set of plastic-steel sheet piles into the embankment foundation between the piping outlet of the original dam and the embankment body, so that the first set of plastic-steel sheet piles cut off the piping channel of the embankment; S2. Observe whether the piping outlet of the original dam is seeping with water and carrying sand; S3. When water and sand seep out of the piping outlet of the original dam, the next group of plastic-steel sheet piles are inserted into the embankment foundation between the first group of plastic-steel sheet piles and the embankment body until water and sand seep out of the piping outlet of the original embankment stop.

[0013] In a possible design, after obtaining the location of the piping outlet of the original dam and inserting a first set of plastic-steel sheet piles into the embankment foundation between the piping outlet of the original dam and the embankment body so that the first set of plastic-steel sheet piles cut off the piping channel, the method further includes: S1. Determine whether a new piping outlet appears; S2. When a new piping outlet appears and is located between the original embankment piping outlet and the embankment, the next set of plastic-steel sheet piles are sequentially inserted into the embankment foundation between the new piping outlet and the embankment until the new piping outlet stops seeping water and carrying sand. S3. When a new piping outlet appears and the new piping outlet is located on the side of the original dam piping outlet away from the dam body, the next set of plastic-steel sheet piles will continue to be inserted in sequence into the dam foundation between the new piping outlet and the original dam piping outlet until the new piping outlet stops seeping water and carrying sand.

[0014] In this application, when used in practice, first place two sets of support seats in the designated position, then insert the plug plates at the bottom into the embankment base, and support the surface with the abutment plates, then unscrew the bolts of the two support seats and remove the auxiliary plates, then the tenons or tenons of the plastic-steel sheet piles can be inserted downward along the clearance cavity between the two support seats to ensure vertical insertion, then use bolts to pass through the mounting holes, and fix the support seats together with the web part of the plastic-steel sheet piles, and the support seat in the middle will connect the plastic-steel sheet piles on both sides together, thereby increasing stability.

[0015] In the present invention, the assembled plastic-steel sheet pile structure for dam piping treatment and the method for using the same can achieve a quick assembly effect through a mortise and tenon modular structure, thereby improving rescue efficiency. The support base assembly ensures that the sheet piles are vertically inserted into the embankment foundation. The permeable filter layer and the reverse filter layer form a double protection, which can effectively intercept sand and gravel carried by seepage water and ensure smooth drainage. The filter layer is prevented from being lost by the pressure of coarse gravel on fine gravel. In the present invention, the assembled plastic-steel sheet pile structure for dam piping treatment and the method for using the same can achieve the goal of determining the subsequent construction direction based on the seepage and sand carrying situation through graded blocking. If the outlet is moved to the side of the embankment, new sheet piles are inserted in the direction of the embankment with increasing depth; if the outlet is moved away from the embankment, new sheet piles are inserted in the opposite direction with increasing depth. By responding to geological changes in real time, corresponding layered seepage interception is achieved, thereby forming a continuous protection operation and improving work efficiency. In the present invention, when in use, by inserting plastic-steel sheet piles into the piping channel between the outlet of the piping channel and the embankment, the seepage path is extended, the seepage and sand carrying at the outlet of the piping channel is effectively reduced or even avoided, and the embankment piping treatment is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the distribution structure of the plastic-steel sheet piles based on Example 1 in the present invention.

[0017] Figure 2 This is a first view of the distribution structure of plastic-steel sheet piles at various levels based on Example 2 of the present invention; Figure 3 This is a second view of the distribution structure of plastic-steel sheet piles at various levels based on Example 2 of the present invention; Figure 4 This is a first view of the distribution structure of plastic-steel sheet piles at various levels based on Example 3 of the present invention; Figure 5 This is a second view of the distribution structure of plastic-steel sheet piles at various levels based on Example 3 of the present invention; Figure 6 This is a first view of the plastic-steel sheet pile of the present invention; Figure 7This is a second view of the plastic-steel sheet pile of the present invention; Figure 8 This is a flow chart of a method for using an assembled plastic-steel sheet pile structure for dam piping treatment proposed in the present invention; Figure 9 This is a schematic diagram of the support structure of an assembled plastic-steel sheet pile structure for dam piping treatment proposed in the present invention; Figure 10 This is a schematic diagram of the support base installation structure of an assembled plastic-steel sheet pile structure for dam piping treatment proposed in the present invention.

[0018] In the figure: 1. Plastic steel sheet pile; 1.1. Tenon; 1.2. Web; 1.3. Tenon; 1.4. Support seat; 1.5. Abutment plate; 1.6. Insert plate; 1.7. Auxiliary plate; 1.8. Give way cavity; 1.21. Mounting hole; 2. Filter layer; 3. Permeable filter layer; 4. Embankment body; 5. Piping channel; 5.1. Piping inlet; 5.2. Piping outlet; 6. Embankment foundation. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1: Reference Figure 6 , an assembled plastic-steel sheet pile structure, including: an assembled plastic-steel sheet pile structure for dam piping treatment, and applied to a dam with a dam body and a dam foundation to cut off the piping channel and prevent water seepage and sand from the outlet of the piping channel.

[0021] Specifically, the assembled plastic-steel sheet pile structure for treating dam piping includes at least one set of plastic-steel sheet piles 1, which are arranged in the embankment foundation 6 and on the backwater side of the embankment body 4; Furthermore, the plastic-steel sheet pile 1 is located between the piping outlet 5.2 and the embankment body 4 and is inserted into the embankment foundation 6 to cut off the piping channel 5, thereby reducing or even blocking the seepage and sand carrying at the piping channel outlet.

[0022] By inserting plastic-steel sheet piles 1 into the piping channel 5 between the piping outlet 5.2 and the embankment body 4, the seepage path is extended, the embankment piping treatment is achieved, the seepage and sand carrying at the piping channel outlet are effectively reduced or even avoided, and the piping blocking efficiency of the embankment foundation 6 is improved.

[0023] It is understandable that after the plastic-steel sheet pile 1 is inserted into the embankment foundation 6, the end of the plastic-steel sheet pile 1 is lower than the piping channel 5, so that the plastic-steel sheet pile 1 cuts off the piping channel 5. Figure 1-Figure 5 The middle arrow indicates the flow direction of the fluid in the piping channel 5 .

[0024] In this embodiment, Figure 1 、 Figure 2 and Figure 4 As shown, the assembled plastic-steel sheet pile structure for treating dam piping also includes a permeable filter layer 3 and a reverse filter layer 2; the permeable filter layer 3 is arranged on the surface of the embankment base 6 and covers the plastic-steel sheet pile 1 and the piping outlet 5.2 to filter the seepage water and block the sand and gravel and other impurities brought out by the seepage water at the outlet of the piping channel; the reverse filter layer 2 is arranged above the permeable filter layer 3 to filter out the fine particles brought out by the seepage water and realize the orderly seepage of the seepage water.

[0025] In a specific implementation manner of this embodiment, the permeable filter layer 3 includes a geotextile layer; the geotextile layer has low cost and simple construction process, and can effectively reduce water flow erosion of the soil and slow down the rate of soil erosion; the geotextile layer forms a protective layer to prevent water flow from eroding and stripping the underlying soil, which helps to maintain the stability of the soil.

[0026] Furthermore, the filter layer 2 includes a fine gravel layer and a coarse gravel layer; the gravel layer has good drainage performance, allowing water to pass through and drain away quickly, preventing water from being retained at the outlet of the piping channel, improving drainage stability, and preventing water from forming siltation at the outlet of the piping channel.

[0027] Specifically, the fine gravel layer contacts the water permeable filter layer 3 and covers the water permeable filter layer 3; the coarse gravel layer is arranged above the fine gravel layer and covers the fine gravel layer.

[0028] The difference between the fine gravel layer and the coarse gravel layer is that the gravel particle size used in the fine gravel layer is finer than that used in the coarse gravel layer. Therefore, in this embodiment, a coarse gravel layer with large mass and large particle size is used to cover the fine gravel layer, which effectively avoids the loss of the fine gravel layer under the action of seepage water and sand scouring, thereby improving the structural stability of the filter layer 2; and, after the fine gravel particles located below invade into the gaps in the coarse gravel layer located above, they can play a certain densification role, further reducing the probability of loss of the fine gravel layer under the action of seepage water scouring.

[0029] It should be noted that when the first-level plastic steel sheet pile 1 is not sufficient to prevent the seepage and sand carrying phenomenon at the outlet of the pipe burst channel, multiple groups of plastic steel sheet piles can be inserted into the embankment foundation 6 on the backwater side of the embankment body 4; each group of plastic steel sheet piles 1 can play a certain water-stopping role, thereby forming multiple levels of obstacles on the pipe burst channel 5, so as to further extend the seepage path, disperse and reduce the seepage potential energy, reduce the internal driving factors that drive the occurrence of disasters, and improve the success rate of blocking pipe bursts; at the same time, it helps to slow down the water flow speed, reduce the scouring effect of water flow on the soil and channel structure, and improve the ability to resist scouring.

[0030] refer to Figure 1When the plastic-steel sheet piles 1 are a group, the plastic-steel sheet piles 1 are directly inserted into the embankment foundation 6; that is, the staff does not need to judge the geological conditions, but only needs to simply insert the plastic-steel sheet piles 1. The construction process is simple and easy to operate.

[0031] This application can be used in the field of dam piping treatment, and can also be used in other fields applicable to this application.

[0032] Example 2: Reference Figure 2-3 , an assembled plastic-steel sheet pile structure for dam piping treatment, which is applied to the field of dam piping treatment. After the first group of plastic-steel sheet piles are inserted into the embankment foundation 6, although it has a certain blocking effect on the seepage and sand carrying phenomenon at the piping channel outlet (original embankment piping outlet 5.2), a new piping outlet 5.2 may appear on the side of the original embankment piping outlet 5.2 away from the embankment body 4. In order to realize the embankment piping treatment at the new outlet, it is necessary to insert multiple groups of plastic-steel sheet piles (that is, group insertion of plastic-steel sheet piles 1).

[0033] In this embodiment, when a new piping outlet 5.2 appears, it means that the insertion depth of the first group of plastic-steel sheet piles is not enough to block the piping channel 5. Therefore, the insertion depth of each subsequent group of plastic-steel sheet piles 1 should be gradually increased to achieve the purpose of dam piping treatment.

[0034] Specifically, when there are multiple groups of plastic steel sheet piles 1, Figure 2 and Figure 3 As shown, the depth of the multiple groups of plastic-steel sheet piles 1 inserted into the embankment foundation 6 gradually increases along the backwater side of the embankment body 4 away from the embankment body 4, that is, the depth of the multi-stage plastic-steel sheet piles inserted into the embankment body 4 gradually increases along the direction from the original embankment piping outlet 5.2 to the new piping outlet 5.2. By arranging the plastic-steel sheet piles 1 at different depths, the impact of water flow on the soil and channel structure can be better dispersed, reducing possible settlement and instability risks; at the same time, the plastic-steel sheet piles 1 at different depths can better adapt to factors such as groundwater level and soil layer structure that change differently due to different depths.

[0035] Example 3: Reference Figure 4-5 After the first set of plastic-steel sheet piles are inserted into the embankment foundation 6, although a certain blocking effect is produced on the seepage and sand-carrying phenomenon of the piping channel outlet (the original embankment piping outlet 5.2), a new piping outlet 5.2 may still appear on the side of the original embankment piping outlet 5.2 close to the embankment body 4. In order to block the seepage and sand-carrying of the original embankment piping outlet 5.2 or the new piping outlet 5.2, multiple sets of plastic-steel sheet piles need to be inserted, and the insertion order of the multiple sets of plastic-steel sheet piles is: from the original embankment piping outlet 5.2 toward the embankment body 4.

[0036] In this embodiment, when a new piping outlet 5.2 appears, it means that the insertion depth of the first group of plastic-steel sheet piles is not enough to block the piping channel 5. Therefore, the insertion depth of each subsequent group of plastic-steel sheet piles 1 should be gradually increased to achieve the purpose of dam piping treatment.

[0037] Specifically, when there are multiple groups of plastic-steel sheet piles 1, the depths of the multiple groups of plastic-steel sheet piles 1 inserted into the embankment foundation 6 gradually increase along the backwater side of the embankment body 4 and toward the embankment body 4. That is, the depth of the multi-stage plastic-steel sheet piles inserted into the embankment 4 gradually increases along the direction from the original embankment piping outlet 5.2 to the embankment 4, or along the direction from the original embankment piping outlet 5.2 to the new piping channel outlet. By setting the plastic-steel sheet piles 1 at different depths, the impact of water flow on the soil and channel structure can be better dispersed, reducing possible settlement and instability risks; at the same time, plastic-steel sheet piles 1 at different depths can better adapt to factors such as groundwater level and soil layer structure that change differently due to different depths.

[0038] In one embodiment of the present invention, Figure 6 、 Figure 7 As shown, the plastic-steel sheet pile 1 includes multiple mortise and tenon structures that can be disassembled and assembled. The mortise and tenon structures include: a tenon 1.1, a web 1.2, and a tenon 1.3; the web 1.2 is arranged on one side of the tenon 1.1, and the tenon 1.3 is arranged on the side of the web 1.2 away from the tenon 1.1; two adjacent mortise and tenon structures are connected by the cooperation between the tenon 1.1 and the tenon 1.3; Each adjacent mortise and tenon structure in the plastic-steel sheet pile 1 is detachably connected. Therefore, when installing the plastic-steel sheet pile 1, the following two methods can be used: first, mechanically drive one mortise and tenon structure into the embankment foundation 6 to cut off the pipe flow channel 5, then align the tenon 1.3 of the second mortise and tenon structure with the tenon buckle 1.1 of the first mortise and tenon structure, and mechanically drive the second mortise and tenon structure into the embankment foundation 6 to cut off the pipe flow channel 5, thereby completing the assembly of the second mortise and tenon structure with the first mortise and tenon structure; then align the tenon buckle 1.1 of the third mortise and tenon structure with the tenon 1.3 of the first mortise and tenon structure, and mechanically drive the third mortise and tenon structure into the embankment foundation 6 to cut off the pipe flow channel 5, thereby completing the assembly of the third mortise and tenon structure with the first mortise and tenon structure. Alternatively, after assembling and reinforcing multiple mortise and tenon structures on the ground, the plastic-steel sheet pile 1 can be mechanically driven into the embankment foundation 6 as a whole to block the pipe flow channel 5.

[0039] It can be understood that since the tenon 1.3 and the tenon buckle 1.1 cooperate with each other, they can be assembled on the tenon 1.3 or tenon buckle 1.1 side of a mortise and tenon structure to form the plastic-steel sheet pile 1 as a whole; at the same time, even if the plastic-steel sheet pile 1 has been installed, due to actual blocking needs, the mortise and tenon structure can be assembled on the tenon 1.3 or tenon buckle 1.1 side of the plastic-steel sheet pile 1 to lengthen the plastic-steel sheet pile 1.

[0040] In one implementation of this embodiment, the tenon 1.3 is a T-shaped tenon 1.3; the shape of the tenon buckle 1.1 matches the shape of the tenon 1.3, so that the overall appearance of the tenon buckle 1.1 is T-shaped.

[0041] refer to Figure 9-10 Furthermore, the plastic-steel sheet pile 1 also includes a group of support seats 1.4, and each group of support seats 1.4 is provided with two, and a clearance cavity 1.8 is provided between the two support seats 1.4, and the clearance cavity 1.8 has the same shape as the tenon 1.1 and the tenon 1.3 connected in the two plastic-steel sheet piles 1, and the side wall of the support seat 1.4 is provided with an abutment plate 1.5 for supporting the surface of the embankment base 6, and the bottom of the support seat 1.4 is provided with an insert plate 1.6 for inserting into the embankment base 6, and an auxiliary plate 1.7 is provided between the two support seats 1.4, and mounting holes 1.21 are provided on the surface of the web 1.2 and on the top of one side close to the tenon 1.1 and the tenon 1.3.

[0042] Specifically, first place the two sets of support seats in the designated position, then insert the plug plates at the bottom into the embankment foundation, and support the surface with the abutment plates. Then unscrew the bolts of the two support seats and remove the auxiliary plates. Then, the tenons or tenons of the plastic-steel sheet piles can be inserted downward along the clearance cavity between the two support seats to ensure vertical insertion. After that, use bolts to pass through the installation holes, and fix the support seats together with the web part of the plastic-steel sheet piles. The support seat in the middle will connect the plastic-steel sheet piles on both sides together to increase stability.

[0043] Based on any one of the above assembled plastic-steel sheet pile structures for treating dam piping, a method for using the assembled plastic-steel sheet pile structure for treating dam piping is also included, such as Figure 8 As shown, the method of use includes the following steps: 1. Obtain the location of the piping outlet of the original dam, and insert the first set of plastic-steel sheet piles into the embankment foundation between the outlet of the original embankment piping channel and the embankment body, so that the first level of plastic-steel sheet piles cut off the embankment piping channel; Specifically, the original dam piping channel outlet 5.2 represents the outlet of the piping channel 5 before the assembled plastic-steel sheet pile structure for dam piping treatment is used to block the piping channel 5; By obtaining the position of the original dam piping channel outlet 5.2, the position of the first group of plastic steel sheet piles can be determined, that is, the position of the first group of plastic steel sheet piles is between the original dam piping channel outlet 5.2 and the embankment body 4, so that after the first group of plastic steel sheet piles are vertically inserted downward into the embankment foundation 6, the first group of plastic steel sheet piles can intersect with the piping channel 5, and the lower end of the first group of plastic steel sheet piles is lower than the piping channel 5, thereby cutting off the piping channel 5 and achieving the first blocking of the piping channel 5.

[0044] 2. Observe whether there is water seepage and sand at the outlet of the original dam pipe flow channel; Specifically, due to factors such as geological conditions, the piping channel 5 may not be successfully blocked after the first blocking by the first group of plastic-steel sheet piles, resulting in the phenomenon that the original dam piping channel outlet 5.2 continues to seep water and carry sand; therefore, after the first blocking, it is necessary to observe whether the original dam piping channel outlet 5.2 seeps water and carries sand, so as to determine whether it is necessary to continue to insert the next level of plastic-steel sheet piles 1 to achieve successful blocking of the piping channel 5.

[0045] 3. When water and sand seep from the piping outlet of the original dam, plastic steel sheet piles are inserted in groups in the embankment foundation between the first group of plastic steel sheet piles and the embankment body until water and sand seep from the piping outlet of the original embankment stop.

[0046] Specifically, when the original dam piping outlet 5.2 is still seeping water and carrying sand, a second group of plastic steel sheet piles is inserted upstream of the first group of plastic steel sheet piles, that is, in the embankment foundation 6 between the first group of plastic steel sheet piles and the embankment body 4, and then observe again whether the original dam piping outlet 5.2 is seeping water and carrying sand; if the original dam piping outlet 5.2 is still seeping water and carrying sand, a third group of plastic steel sheet piles is inserted upstream of the second group of plastic steel sheet piles, that is, in the embankment foundation 6 between the second group of plastic steel sheet piles and the embankment body 4, and the cycle is repeated to achieve grouped insertion of plastic steel sheet piles 1 until the original dam piping outlet 5.2 stops seeping water and carrying sand, and the piping channel 5 is blocked.

[0047] Furthermore, after obtaining the location of the piping channel outlet of the original dam and inserting a first set of plastic-steel sheet piles into the embankment foundation between the piping channel outlet of the original dam and the embankment body so that the first-stage plastic-steel sheet piles cut off the piping channel, the method further includes: Determine whether there is a new outlet for dam piping; Specifically, due to factors such as geological conditions, the piping channel 5 may not be successfully blocked after the first blocking by the first-level plastic-steel sheet piles, and a new piping channel outlet may seep water and carry sand at the original dam piping outlet 5.2 close to the embankment body 4 or away from the embankment body 4. Therefore, in the present invention, after the first blocking, it is necessary to observe whether a new piping channel outlet appears, so as to judge whether it is necessary to continue inserting the next group of plastic-steel sheet piles 1, and the insertion direction of the next group of plastic-steel sheet piles 1 relative to the previous group of plastic-steel sheet piles 1, to achieve successful blocking of the piping channel 5. When a new piping channel outlet appears, and the new piping channel outlet is located between the original dam piping channel outlet and the embankment body, plastic-steel sheet piles are inserted in groups in the embankment base between the new piping channel outlet and the embankment body until the new piping channel outlet stops seeping water and carrying sand; Specifically, when a new piping channel outlet appears and the new piping channel outlet is located between the original dam piping channel outlet 5.2 and the embankment body 4, the plastic steel sheet piles 1 can be inserted in groups (such as 1.5mm thick) in the direction from the new piping channel outlet to the embankment body 4 according to the method of embodiment 3. Figure 4 and Figure 5 As shown, first insert the second pressurized plastic steel sheet pile 1B between the first group of plastic steel sheet piles 1A and the embankment 4, and judge whether the new pipe channel outlet is still seeping water and carrying sand; if the new pipe channel outlet is still seeping water and carrying sand, insert the third group of plastic steel sheet piles 1C between the second plastic steel sheet piles 1B and the embankment 4, and repeat the cycle; wherein, the inlet 5.1 of the pipe channel 5 is as shown Figure 5 as shown), until the new piping channel outlet stops seeping water and carrying sand.

[0048] When a new piping channel outlet appears and the new piping channel outlet is located on the side of the original dam piping outlet 5.2 away from the dam body, plastic-steel sheet piles are inserted in groups in the dam foundation between the new piping channel outlet and the original dam piping outlet until the new piping channel outlet stops seeping water and carrying sand.

[0049] Specifically, when a new piping outlet appears and the new piping outlet is located on the side of the original dam piping outlet 5.2 away from the dam body 4, the method of the second embodiment can be used to insert plastic steel sheet piles 1 in groups (such as 1000, ... Figure 2 and Figure 3 As shown, first insert the second-stage plastic steel sheet pile 1D on the side of the first group of plastic steel sheet piles 1A away from the embankment 4, and judge whether the new pipe flow outlet still seeps water and carries sand; if the new pipe flow outlet still seeps water and carries sand, insert the third group of plastic steel sheet piles 1E on the side of the second-stage plastic steel sheet pile 1D away from the embankment 4, and replace them back and forth; wherein, the entrance 5.1 of the pipe flow channel 5 is as shown Figure 3 as shown), until the new piping channel outlet stops seeping water and carrying sand.

[0050] It should be noted that, each time a level of plastic-steel sheet piles 1 is inserted, a permeable filter layer 3 and an inverse filter layer 2 are laid in sequence above the plastic-steel sheet piles 1 of that level; and, the permeable filter layers 3 and inverse filter layers 2 corresponding to multiple groups of plastic-steel sheet piles are connected to each other, thereby covering multiple groups of plastic-steel sheet piles, the original dam pipe outlet 5.2 and the new pipe channel outlet.

[0051] In summary, the present invention provides an assembled plastic-steel sheet pile structure for treating dam piping and a method of using the same. By inserting steel sheet piles into the piping channel between the outlet of the piping channel and the embankment body, the seepage path is extended, effectively reducing or even avoiding the seepage and sand carrying at the outlet of the piping channel, thereby improving the efficiency of blocking piping in the embankment foundation.

[0052] The drawings in this application are for illustrative purposes only. The sizes and shapes of the components shown are not intended to be limiting, but are merely for illustrative purposes. In actual implementation, the components may be appropriately configured and adjusted based on specific needs and actual conditions.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An assembled plastic steel sheet pile structure for dam piping treatment, characterized in that: include: At least one group of plastic-steel sheet piles (1), wherein each group of plastic-steel sheet piles (1) is provided with a plurality of plastic-steel sheet piles (1), the plastic-steel sheet piles (1) being located within the embankment foundation (6) and arranged on the backwater side of the embankment body (4); The first group of plastic-steel sheet piles (1) is installed between the piping outlet (5.2) and the embankment (4) to cut off the piping channel (5).

2. The assembled plastic-steel sheet pile structure for dam piping treatment according to claim 1 is characterized in that: Also includes: A water-permeable filter layer (3) is provided on the surface of the embankment foundation (6) and covers the plastic-steel sheet pile (1) and the piping outlet (5.2); The reverse filter layer (2) is arranged above the water permeable filter layer (3).

3. The assembled plastic-steel sheet pile structure for dam piping treatment according to claim 2 is characterized in that: The permeable filter layer (3) comprises a geotextile layer.

4. The assembled plastic-steel sheet pile structure for dam piping treatment according to claim 3 is characterized in that: The filter layer (2) comprises: a fine gravel layer in contact with the permeable filter layer (3); The coarse gravel layer is arranged above the fine gravel layer.

5. The assembled plastic-steel sheet pile structure for treating dam piping according to claim 1 is characterized in that: When the plastic-steel sheet piles (1) are in multiple groups, the depth of each group of plastic-steel sheet piles (1) inserted into the embankment foundation (6) increases gradually along the backwater side of the embankment body (4) in a direction away from the embankment body (4).

6. The assembled plastic-steel sheet pile structure for treating dam piping according to claim 1 is characterized in that: When there are multiple groups of the plastic-steel sheet piles (1), the depths of the multiple groups of the plastic-steel sheet piles (1) inserted into the embankment foundation (6) increase gradually along the backwater side of the embankment body (4) in a direction closer to the embankment body (4).

7. The assembled plastic-steel sheet pile structure for treating dam piping according to claim 1 is characterized in that: The plastic-steel sheet pile (1) comprises a plurality of detachably assembled mortise and tenon structures, wherein the mortise and tenon structures comprise: tenon in a mortise and tenon joint (1.3); A web (1.2) is provided on one side of the tenon (1.3); The tenon buckle (1.1) in the mortise and tenon structure is arranged on a side of the web (1.2) away from the tenon (1.3); two adjacent mortise and tenon structures are connected through the cooperation of the tenon (1.3) and the tenon buckle (1.1).

8. The assembled plastic-steel sheet pile structure for treating dam piping according to claim 7 is characterized in that: The plastic-steel sheet pile (1) further comprises a group of support seats (1.4), and each group of support seats (1.4) is provided with two, a clearance cavity (1.8) is provided between the two support seats (1.4), and the clearance cavity (1.8) has the same shape as the tenon (1.1) and the tenon (1.3) connected in the two plastic-steel sheet piles (1), the side wall of the support seat (1.4) is provided with an abutment plate (1.5) for supporting the surface of the embankment base (6), the bottom of the support seat (1.4) is provided with an insert plate (1.6) for inserting into the embankment base (6), an auxiliary plate (1.7) is provided between the two support seats (1.4), and mounting holes (1.21) are provided on the surface of the web (1.2) and at the top of one side close to the tenon (1.1) and the tenon (1.3), respectively, and the support seat (1.4) is fixedly connected to the mounting hole (1.21) of the web (1.2) by bolts.

9. A method for using the assembled plastic-steel sheet pile structure for dam piping treatment according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Obtain the location of the original dam piping outlet (5.2), insert a first set of plastic steel sheet piles (1) into the dam foundation (6) between the original dam piping outlet (5.2) and the dam body (4), so that the first set of plastic steel sheet piles (1) cut off the dam piping channel (5); S2. Observe whether the piping outlet (5.2) of the original dam is seeping with water and carrying sand; S3. When the original dam piping outlet (5.2) is seeping with water and carrying sand, the next group of plastic-steel sheet piles (1) is sequentially inserted into the embankment base (6) between the first group of plastic-steel sheet piles (1) and the embankment body (4) until the original embankment piping outlet (5.2) stops seeping with water and carrying sand.

10. The method for using the assembled plastic-steel sheet pile structure for treating dam piping according to claim 9, characterized in that: The method further comprises: obtaining the position of the original dam piping outlet (5.2) and inserting a first set of plastic steel sheet piles (1) into the embankment foundation (6) between the original embankment piping outlet (5.2) and the embankment body (4) so that the first set of plastic steel sheet piles (1) cut off the piping channel (5); S1. Determine whether a new piping outlet has appeared (5.2); S2. When a new piping outlet (5.2) appears and the new piping outlet (5.2) is located between the original embankment piping outlet (5.2) and the embankment body (4), the next set of plastic steel sheet piles (1) are sequentially inserted into the embankment foundation (6) between the new piping outlet (5.2) and the embankment body (4) until the new piping outlet (5.2) stops seeping water and carrying sand; S3. When a new piping outlet (5.2) appears and the new piping outlet (5.2) is located on the side of the original embankment piping outlet (5.2) away from the embankment body (4), the next set of plastic steel sheet piles (1) are inserted into the embankment foundation (6) between the new piping outlet (5.2) and the original embankment piping outlet (5.2) until the new piping outlet (5.2) stops seeping water and carrying sand.

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