Sand soil roadbed splicing width side slope seepage stability protection structure and method under hydrodynamic pressure

Abstract

The present application relates to the technical field of slope protection, in particular to a sand soil subgrade widening slope seepage stability protection structure and method under hydrodynamic pressure, the structure comprises: a widening subgrade and a slope body, a fixing frame is installed on the slope body, a drainage pipe and a flow guide assembly are installed on the fixing frame. When the soil layer of the slope body subsides, the pressure of the soil layer on the arc-shaped slide plate increases, the extrusion effect generated by the subsidence of the soil layer is greater than the elastic force of the compression spring, which pushes the arc-shaped slide plate to slide downward along the flow guide pipe, the liquid inlet hole on the arc-shaped slide plate corresponds to the annular guide groove on the straight cylinder, the water in the slope body flows into the annular guide groove through the liquid inlet hole, and then flows into the drainage pipe through the annular guide groove and the communication hole. At this time, the water has not been filtered by the porous foam plastic, and the water quality is poor. After the unfiltered water flows through the water quality sensor at the corresponding connecting branch pipe, the water quality sensor sends a signal to reinforce the slope body at this position in time to prevent the slope body from collapsing.

Description

Technical Field

[0001] This invention relates to the field of slope protection technology, specifically to a seepage stability protection structure and method for widened sandy roadbed slopes under dynamic water pressure. Background Technology

[0002] With the rapid development of my country's economy and the continuous growth of transportation demand, the widening and upgrading of existing expressways has become a necessary means. At present, the main method for widening expressways nationwide is to combine the old and new roadbeds.

[0003] As an important component of the roadbed, the slope is prone to landslides when the roadbed is widened and filled with sand. The sand on the new roadbed has high permeability, and water can easily seep along the slope.

[0004] Based on this, the first step of the existing technical solution is to use protective components to fix the slope and provide protection for the slope. The second step is to draw out the water in the slope soil by inserting a diversion pipe into the slope, such as the utility model patent with announcement number CN220184047U.

[0005] The existing solution has the following technical problems when used: First, the drainage efficiency is insufficient, making it difficult to effectively reduce the moisture content of the slope soil. In existing designs, multiple through-holes are typically created in the pipe wall to allow seepage water from various soil layers to flow into the pipe. However, in actual engineering, due to factors such as the direction of seepage within the slope, the anisotropy of the soil permeability coefficient, and uneven distribution of pore water pressure, seepage water flowing into the pipe from one through-hole may seep out again at the other through-hole downstream (especially when the pore water pressure outside the pipe is lower than the water pressure inside), creating a short-circuit phenomenon within the pipe. This phenomenon results in a significant portion of the seepage water only flowing in and out within a local section of the pipe, failing to be transported along the entire pipe to the drainage outlet, significantly reducing the drainage efficiency of the pipe and the desiccation effect on the slope soil.

[0006] It should be noted that the aforementioned problem of "short-circuiting drainage caused by through-holes" is not a theoretical conjecture, but a phenomenon commonly observed by those skilled in the art in widening projects of sandy roadbeds. Due to the high permeability coefficient of sandy soil, the seepage paths within the slope are complex and variable. The presence of through-holes in the diversion pipe creates excessive hydraulic connectivity between the inside and outside of the pipe, causing water to seep back into the soil from the downstream orifice before reaching the drainage outlet under gravity. This phenomenon is particularly pronounced during periods of concentrated rainfall or rising groundwater levels, and is one of the important factors affecting the actual effectiveness of slope drainage systems.

[0007] Second, there is a lack of effective monitoring and early warning methods for the precursors of slope instability. Existing technologies use drainage pipes that only provide passive drainage and cannot detect or reflect the deformation state of the slope soil. Before a landslide, a slope typically undergoes a slow process of soil creep and settlement, but existing solutions lack corresponding monitoring and early warning mechanisms. Once poor drainage leads to increased soil moisture content and decreased shear strength, the slope may suddenly collapse, threatening traffic safety and the stability of the roadbed structure. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a seepage stability protection structure and method for widened slopes of sandy roadbeds under dynamic water pressure.

[0009] The objective of this invention can be achieved through the following technical solutions: A seepage stabilization and protection structure for widened sandy roadbed slopes under dynamic water pressure includes: a widened roadbed and a slope body on one side of the widened roadbed; a water collection trough is constructed at the bottom of the slope body; a fixing frame is installed on the slope body; a drainage pipe and a flow guiding component are installed on the fixing frame; the drainage pipe is connected to the flow guiding component and leads to the water collection trough; the flow guiding component is obliquely inserted into the slope body, with the inlet end facing upwards and the outlet end facing downwards; the flow guiding component includes a flow guiding pipe, the upper half of which has an inner groove, and an arc-shaped sliding plate is slidably installed in the inner groove; a straight cylinder is fixedly installed inside the flow guiding pipe, and the straight cylinder is filled with porous foam plastic; the arc-shaped sliding plate has an inlet hole, and the straight cylinder has a strip hole; when the inlet hole and the strip hole are connected, water in the slope body enters the straight cylinder through the inlet hole and the strip hole, and is filtered by the porous foam plastic before being discharged from the straight cylinder.

[0010] As a further aspect of the present invention: a compression spring is installed in the inner groove, and the compression spring is connected to the arc-shaped sliding plate.

[0011] As a further aspect of the present invention: an annular guide groove is formed on the straight cylinder, the annular guide groove is located between two adjacent shaped holes, and a connecting hole is formed at the bottom of the straight cylinder, the annular guide groove and the connecting hole are connected.

[0012] As a further aspect of the present invention: when the arc-shaped sliding plate slides, the liquid inlet hole on the arc-shaped sliding plate corresponds to the annular guide groove, and the water in the slope body is directly discharged into the drainage pipe through the liquid inlet hole, the annular guide groove and the connecting hole.

[0013] As a further aspect of the present invention: a water quality sensor is independently installed at the connecting branch of the drainage pipe corresponding to each diversion component. Each water quality sensor is independently numbered according to its location on the slope body and recorded one by one with its installation location. When a water quality sensor detects that the turbidity of the water exceeds the set threshold, it sends a signal containing its number. The staff can then locate the corresponding diversion component installation area based on the number, thereby accurately finding the specific location of soil subsidence.

[0014] As a further aspect of the present invention: a drainage ditch is constructed on one side of the widened roadbed, and the accumulated water on the widened roadbed is drained into the drainage ditch.

[0015] A method for seepage stability protection of widened slopes in sandy roadbeds under dynamic water pressure, the method being applied to the slope seepage stability protection structure described above, the method comprising the following steps: Step S1: During the roadbed widening construction, the fixing frame is fixed to the slope body to reinforce the slope body, and then the diversion component is installed inside the slope body. Step S2: When the slope body seeps water, the water seeping into the slope body enters the straight cylinder through the liquid inlet hole of the arc-shaped slide and the strip hole of the straight cylinder. After being filtered by the porous foam plastic in the straight cylinder, the water is discharged from the liquid outlet hole of the straight cylinder into the guide pipe, and finally discharged into the water collection tank through the drainage pipe. Step S3: The porous foam plastic can filter out the mud and sand in the water, preventing the mud and sand from clogging the drainage pipe and causing it to be unable to drain properly.

[0016] As a further aspect of the present invention, the method further includes the following steps: Step S4: When the slope body experiences soil subsidence, the arc-shaped sliding plate and the surrounding soil undergo relative displacement. The squeezing effect of the soil on the arc-shaped sliding plate gradually increases. When this squeezing effect exceeds the elastic force of the compression spring, it pushes the arc-shaped sliding plate to slide along the guide pipe. Step S5: As the arc-shaped slide slides, the liquid inlet on the arc-shaped slide corresponds to the annular guide groove on the straight cylinder. The water in the slope body flows into the annular guide groove through the liquid inlet, and then flows into the drain pipe through the annular guide groove and the connecting hole. Step S6: Since the water is not filtered by porous foam plastic and the water quality is poor, the unfiltered water flows through the water quality sensor at the corresponding connecting branch pipe. The water quality sensor sends a signal, and the staff finds the area of ​​soil subsidence based on the signal location and reinforces the slope body at that location in time to prevent the slope body from collapsing.

[0017] The beneficial effects of this invention are: (1) The present invention slides an arc-shaped slide plate on the upper half of the guide pipe. Through the design of the liquid inlet hole on the arc-shaped slide plate, water can only enter the guide pipe from one side. Therefore, when the guide pipe is installed in the correct position, the water that seeps into the guide pipe flows into the drain pipe along the inclined direction of the guide pipe, ensuring that all the water that enters the guide pipe can be guided out, and avoiding the phenomenon of water seeping out while the guide pipe is being guided.

[0018] (2) When the slope body seeps water, the water seeping into the slope body enters the straight cylinder through the liquid inlet hole of the arc-shaped slide and the strip hole of the straight cylinder. After the water is filtered by the porous foam plastic in the straight cylinder, it is discharged into the guide pipe through the liquid outlet hole of the straight cylinder, and finally discharged into the water collection tank through the drainage pipe. During this process, the porous foam plastic can filter out the mud and sand in the water, preventing the mud and sand from clogging the guide pipe and causing the guide pipe to be unable to drain normally.

[0019] (3) When the soil layer of the slope body sinks, the arc-shaped sliding plate buried in the soil layer is subjected to increasing compression as the soil moves. When the compression exceeds the elastic force of the compression spring, it pushes the arc-shaped sliding plate to slide down along the guide pipe. The liquid inlet on the arc-shaped sliding plate corresponds to the annular guide groove on the straight cylinder. The water in the slope body flows into the annular guide groove through the liquid inlet and then into the drainage pipe through the annular guide groove and the connecting hole. At this time, the water is not filtered by porous foam plastic and the water quality is poor. After the unfiltered water flows through the water quality sensor at the corresponding connecting branch pipe, the water quality sensor sends a signal. The staff finds the area where the soil layer sinks according to the signal location and reinforces the slope body at that location in time to prevent the slope body from collapsing. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the overall structure of the present invention; Figure 3 This is a cross-sectional view of the overall structure of the present invention; Figure 4 This is a cross-sectional view of the overall structure of the flow guiding component; Figure 5 This is a schematic diagram of the disassembled structure of the guide tube and the straight cylinder; Figure 6 This is a schematic diagram of the bottom structure of the straight cylinder; Figure 7 This is a cross-sectional view of the overall structure of the guide tube; Figure 8 This is a schematic diagram showing the flow of water through porous foam plastic; Figure 9 This is a schematic diagram of the sand and gravel foundation structure of the present invention.

[0022] In the diagram: 1. Slope body; 2. Widened roadbed; 3. Drainage ditch; 4. Water collection trough; 5. Fixing frame; 6. Drainage pipe; 7. Flow guiding component; 701. Flow guiding pipe; 702. Arc-shaped sliding plate; 703. Liquid inlet hole; 705. Straight cylinder; 706. Liquid outlet hole; 707. Strip hole; 708. Annular guide groove; 709. Connecting hole; 710. Inner sliding groove; 711. Compression spring; 8. Porous foam plastic. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] See Figures 1-8 As shown, a seepage stabilization protection structure for a widened slope of a sandy roadbed under dynamic water pressure is described. The structure includes: a widened roadbed 2 and a slope body 1 on one side of the widened roadbed 2. A water collection trough 4 is constructed at the bottom of the slope body 1. A fixing frame 5 is installed on the slope body 1. A drainage pipe 6 and a flow guiding component 7 are installed on the fixing frame 5. The drainage pipe 6 is connected to the flow guiding component 7 and leads to the water collection trough 4. The flow guiding component 7 is obliquely inserted into the slope body 1, with the inlet end facing upwards and the outlet end facing downwards. The flow guiding component 7 includes a flow guiding pipe 701. The upper part of the guide pipe 701 has an inner sliding groove 710, and an arc-shaped sliding plate 702 is slidably installed in the inner sliding groove 710. A straight cylinder 705 is fixedly installed in the guide pipe 701, and the straight cylinder 705 is filled with porous foam plastic 8. The arc-shaped sliding plate 702 has a liquid inlet hole 703, and the straight cylinder 705 has a strip hole 707. When the liquid inlet hole 703 and the strip hole 707 are connected, the water in the slope body 1 enters the straight cylinder 705 through the liquid inlet hole 703 and the strip hole 707, and is filtered and discharged from the straight cylinder 705 through the porous foam plastic 8.

[0026] In this invention, an arc-shaped sliding plate 702 is slidably installed on the upper half of the guide pipe 701. Through the design of the liquid inlet hole 703 on the arc-shaped sliding plate 702, water can only enter the guide pipe 701 from one side. Therefore, when the guide pipe 701 is installed in the correct position, the water that seeps into the guide pipe 701 flows into the drain pipe 6 along the inclined direction of the guide pipe 701, ensuring that all the water entering the guide pipe 701 can be guided out, and avoiding the phenomenon of water seeping out while being guided by the guide pipe 701.

[0027] It should be noted that during the roadbed widening construction, the fixing frame 5 is fixed on the slope body 1 to reinforce the slope body 1, and then the diversion component 7 is installed inside the slope body 1.

[0028] When the slope body 1 seeps water, the water seeping into the slope body 1 enters the straight cylinder 705 through the inlet hole 703 of the arc-shaped slide plate 702 and the strip hole 707 of the straight cylinder 705. After being filtered by the porous foam plastic 8 in the straight cylinder 705, the water is discharged into the guide pipe 701 through the drain hole 706 of the straight cylinder 705, and finally discharged into the water collection tank 4 through the drain pipe 6. During this process, the porous foam plastic 8 can filter out the mud and sand in the water, preventing the mud and sand from clogging the guide pipe 701 and causing the guide pipe 701 to be unable to drain normally.

[0029] It should be noted that the slope body 1 is usually accompanied by signs of uneven soil settlement before it collapses. When the soil layer of the slope body 1 settles, the arc-shaped sliding plate 702 buried in the soil layer is subjected to the squeezing action of the surrounding soil due to the soil displacement. This squeezing action gradually increases with the increase of settlement. When this squeezing action exceeds the elastic force of the compression spring 711, it pushes the arc-shaped sliding plate 702 to slide downward along the guide pipe 701. Compared with triggering by water pressure or simply relying on the weight of the soil, this structure uses the displacement and squeezing effect generated by soil settlement as the triggering condition, resulting in a more direct and reliable response. As the curved slide plate 702 slides, the inlet hole 703 on the curved slide plate 702 corresponds to the annular guide groove 708 on the straight cylinder 705. Water in the slope body 1 flows into the annular guide groove 708 through the inlet hole 703, and then flows into the drainage pipe 6 through the annular guide groove 708 and the connecting hole 709. At this time, the water is not filtered by the porous foam plastic 8 and the water quality is poor. The unfiltered water flows through the water quality sensor at the corresponding connecting branch pipe. The water quality sensor sends a signal, and the staff finds the area of ​​soil subsidence based on the signal location and reinforces the slope body 1 at that location in time to prevent the slope body 1 from collapsing. Moreover, because the water is not filtered by the porous foam plastic 8, the water flow speed is faster and the water quality is poor. When the unfiltered water flows through the water quality sensor at the corresponding position in the drainage pipe 6, the water quality sensor detects that the water turbidity exceeds the set threshold and sends a signal containing its number, thereby avoiding false alarms caused by a single indicator and improving the accuracy of detection.

[0030] It should be noted that the sliding trigger of the arc-shaped sliding plate 702 in this structure does not rely on the direct action of soil gravity on the plate surface, but rather utilizes the displacement field changes generated during soil settlement. During the settlement process, the position of the arc-shaped sliding plate 702 relative to the surrounding soil changes, and the lateral constraint and friction of the soil on the plate are converted into a driving force propelling the plate along the inner sliding groove 710. Compared to schemes relying on water pressure or simple gravity loading, this structure is more sensitive to soil deformation and can issue early warning signals in the early stages of slope instability.

[0031] It should be noted that when multiple flow guiding components 7 are connected in parallel to the same drainage pipe 6, each water quality sensor is installed at the connecting branch pipe between each flow guiding component 7 and the drainage pipe 6, rather than in the main drainage pipe. This ensures that each sensor only detects the water sample discharged from its corresponding single flow guiding component 7, preventing the mixing of water samples from multiple locations in the main pipe and thus making it impossible to distinguish the source. Each connecting branch pipe is marked with a unique number, corresponding one-to-one with the installation position of the slope body 1, thereby achieving precise positioning of the subsidence area.

[0032] Furthermore, see Figure 9 This invention lays a gravel foundation at the bottom of the widened roadbed 2. The gravel foundation has high bearing capacity and stability, and excellent permeability, reducing the risk of water seepage into the soil layer of the slope body 1. Placing the end of the diversion pipe 701 through the soil layer of the slope body 1 within the gravel foundation improves the stability of the diversion pipe 701 when dealing with the settlement of the soil layer of the slope body 1. By cooperating with the strip hole 707 and the liquid inlet hole 703, the alignment and fault tolerance between the liquid inlet hole 703 and the strip hole 707 / annular guide groove 708 are improved.

[0033] See Figures 3-8 An annular guide groove 708 is formed on the straight cylinder 705, located between two adjacent shaped holes 707. A connecting hole 709 is formed at the bottom of the straight cylinder 705, and the annular guide groove 708 communicates with the connecting hole 709. Specifically, when the arc-shaped sliding plate 702 slides, the liquid inlet hole 703 on the arc-shaped sliding plate 702 corresponds to the annular guide groove 708, and the water in the slope body 1 is directly discharged into the drain pipe 6 through the liquid inlet hole 703, the annular guide groove 708, and the connecting hole 709. Specifically, a water quality sensor is independently installed at the connection branch of each flow guiding component 7 and the drain pipe 6. Specifically, a compression spring 711 is installed in the inner sliding groove 710, and the compression spring 711 is connected to the arc-shaped sliding plate 702.

[0034] It should be noted that the slope body 1 is usually accompanied by signs of uneven soil settlement before it collapses. When the soil layer of the slope body 1 settles, the arc-shaped sliding plate 702 buried in the soil layer is subjected to the squeezing action of the surrounding soil due to the soil displacement. This squeezing action gradually increases with the increase of settlement. When this squeezing action exceeds the elastic force of the compression spring 711, it pushes the arc-shaped sliding plate 702 to slide downward along the guide pipe 701. Compared with triggering by water pressure or simply relying on the weight of the soil, this structure uses the displacement and squeezing effect generated by soil settlement as the triggering condition, resulting in a more direct and reliable response. As the curved slide plate 702 slides, the liquid inlet hole 703 on the curved slide plate 702 corresponds to the annular guide groove 708 on the straight cylinder 705. Water in the slope body 1 flows into the annular guide groove 708 through the liquid inlet hole 703, and then flows into the drainage pipe 6 through the annular guide groove 708 and the connecting hole 709. At this time, the water is not filtered by the porous foam plastic 8 and the water quality is poor. The unfiltered water flows through the water quality sensor at the corresponding connecting branch pipe. The water quality sensor sends a signal, and the staff finds the area of ​​soil subsidence according to the signal location and reinforces the slope body 1 at that location in time to prevent the slope body 1 from collapsing.

[0035] When repairing the slope body 1, remove the flow guiding component 7; after the repair is completed, re-drill holes and reinstall the flow guiding component 7. If the flow guiding component 7 is damaged due to soil subsidence, replace it during installation.

[0036] It should be noted that the guide pipe 701 can be made detachable, and the straight cylinder 705 can be detachably connected to the guide pipe 701, facilitating cleaning or replacement of the porous foam plastic 8 inside the straight cylinder 705. Since the porous foam plastic 8 traps impurities such as silt during long-term filtration, if it is not cleaned regularly, its pores may become clogged, reducing its permeability. Therefore, in practical use, the guide component 7 can be periodically removed from the slope body 1, the guide pipe 701 disassembled, and the porous foam plastic 8 inside the straight cylinder 705 cleaned or replaced; if the sensor needs to be replaced, it can also be done simultaneously. Regular maintenance ensures the filtration and permeability performance of the porous foam plastic 8, preventing clogging of the porous foam plastic 8 from affecting the normal drainage of the guide pipe 701.

[0037] See Figures 1-3 A drainage ditch 3 is constructed on one side of the widened roadbed 2, and the accumulated water on the widened roadbed 2 is drained into the drainage ditch 3.

[0038] It should be noted that drainage ditch 3 is used to intercept and drain surface water, reducing rainwater infiltration. Drainage ditch 3 prevents rainwater from overflowing and entering the slope body 1 by intercepting surface runoff at the top of the slope. The connection end of the diversion pipe 701 shown in the figure is a bend, but the connection end of the diversion pipe 701 can also be a straight pipe to avoid liquid accumulation at the bend.

[0039] See Figures 1-8As shown, this invention provides a method for seepage stability protection of widened sandy roadbed slopes under dynamic water pressure. The method is applied to the seepage stability protection structure described in the above embodiments, and includes the following steps: Step S1: During the roadbed widening construction, fix the fixing frame 5 on the slope body 1 to reinforce the slope body 1, and then install the diversion component 7 inside the slope body 1. Step S2: When the slope body 1 seeps water, the water seeping into the slope body 1 enters the straight cylinder 705 through the liquid inlet 703 of the arc-shaped slide plate 702 and the strip hole 707 of the straight cylinder 705. After being filtered by the porous foam plastic 8 in the straight cylinder 705, the water is discharged from the liquid outlet 706 of the straight cylinder 705 into the guide pipe 701, and finally discharged into the water collection tank 4 through the drain pipe 6. Step S3: Filter out the mud and sand in the water through the porous foam plastic 8 to prevent the mud and sand from clogging the guide pipe 701.

[0040] See Figures 3-8 As shown, in a preferred embodiment of the present invention, the method further includes the following steps: Step S4: When the soil layer of the slope body 1 settles, the pressure of the soil layer on the arc-shaped sliding plate 702 increases. When the squeezing effect exceeds the elastic force of the compression spring 711, the pressure causes the arc-shaped sliding plate 702 to slide downward along the guide pipe 701. Step S5: As the arc-shaped slide plate 702 slides, the liquid inlet hole 703 on the arc-shaped slide plate 702 corresponds to the annular guide groove 708 on the straight cylinder 705. The water in the slope body 1 flows into the annular guide groove 708 through the liquid inlet hole 703, and then flows into the drain pipe 6 through the annular guide groove 708 and the connecting hole 709. Step S6: Since the water is not filtered by the porous foam plastic 8 and the water quality is poor, the unfiltered water flows through the water quality sensor at the corresponding connecting branch pipe. The water quality sensor sends a signal, and the staff finds the area of ​​soil subsidence according to the signal location and reinforces the slope body 1 at that location in time to prevent the slope body 1 from collapsing.

[0041] Working principle of the invention: In this invention, an arc-shaped sliding plate 702 is slidably installed on the upper half of the guide pipe 701. Through the design of the liquid inlet hole 703 on the arc-shaped sliding plate 702, water can only enter the guide pipe 701 from one side. Therefore, when the guide pipe 701 is installed in the correct position, the water that seeps into the guide pipe 701 flows into the drain pipe 6 along the inclined direction of the guide pipe 701, ensuring that all the water entering the guide pipe 701 can be guided out, and avoiding the phenomenon of water seeping out while being guided by the guide pipe 701.

[0042] It should be noted that during the roadbed widening construction, the fixing frame 5 is fixed on the slope body 1 to reinforce the slope body 1, and then the diversion component 7 is installed inside the slope body 1.

[0043] When the slope body 1 seeps water, the water seeping into the slope body 1 enters the straight cylinder 705 through the inlet hole 703 of the arc-shaped slide plate 702 and the strip hole 707 of the straight cylinder 705. After being filtered by the porous foam plastic 8 in the straight cylinder 705, the water is discharged into the guide pipe 701 through the drain hole 706 of the straight cylinder 705, and finally discharged into the water collection tank 4 through the drain pipe 6. During this process, the porous foam plastic 8 can filter out the mud and sand in the water, preventing the mud and sand from clogging the guide pipe 701 and causing the guide pipe 701 to be unable to drain normally.

[0044] It should be noted that the slope body 1 is usually accompanied by signs of uneven soil settlement before it collapses. When the soil layer of the slope body 1 settles, the arc-shaped sliding plate 702 buried in the soil layer is subjected to the squeezing action of the surrounding soil due to the soil displacement. This squeezing action gradually increases with the increase of settlement. When this squeezing action exceeds the elastic force of the compression spring 711, it pushes the arc-shaped sliding plate 702 to slide downward along the guide pipe 701. Compared with triggering by water pressure or simply relying on the weight of the soil, this structure uses the displacement and squeezing effect generated by soil settlement as the triggering condition, resulting in a more direct and reliable response. As the curved slide plate 702 slides, the liquid inlet hole 703 on the curved slide plate 702 corresponds to the annular guide groove 708 on the straight cylinder 705. Water in the slope body 1 flows into the annular guide groove 708 through the liquid inlet hole 703, and then flows into the drainage pipe 6 through the annular guide groove 708 and the connecting hole 709. At this time, the water is not filtered by the porous foam plastic 8 and the water quality is poor. The unfiltered water flows through the water quality sensor at the corresponding connecting branch pipe. The water quality sensor sends a signal, and the staff finds the area of ​​soil subsidence according to the signal location and reinforces the slope body 1 at that location in time to prevent the slope body 1 from collapsing.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seepage-stabilizing protection structure for widened slopes of sandy roadbeds under dynamic water pressure, characterized in that, The structure includes: a widened roadbed (2) and a slope body (1) on one side of the widened roadbed (2). A water collection trough (4) is built at the bottom of the slope body (1). A fixing frame (5) is installed on the slope body (1). A drainage pipe (6) and a flow guiding component (7) are installed on the fixing frame (5). The drainage pipe (6) is connected to the flow guiding component (7). The drainage pipe (6) is connected to the water collection trough (4). The flow guiding component (7) is inserted obliquely into the slope body (1). The inlet end of the flow guiding component (7) is higher than the outlet end, so that the seepage water flows autonomously to the outlet end under the action of gravity. The flow guiding component (7) includes a flow guiding pipe (701). The upper half of the flow guiding pipe (701) is provided with an inner sliding groove (710). The inner sliding groove (710) is located on one side of the inlet end. An arc-shaped sliding plate (702) is slidably installed in the inner sliding groove (710). The arc-shaped sliding plate (702) is configured to slide along the inner sliding groove (710) when the soil layer of the slope body (1) settles. A straight cylinder (705) is fixedly installed inside the guide pipe (701). The straight cylinder (705) is filled with porous foam plastic (8). The arc-shaped slide plate (702) has an inlet hole (703). The straight cylinder (705) has a strip hole (707). When the inlet hole (703) and the strip hole (707) are connected, the water in the slope body (1) enters the straight cylinder (705) through the inlet hole (703) and the strip hole (707), and is filtered out of the straight cylinder (705) by the porous foam plastic (8).

2. The seepage stability protection structure for widened slopes of sandy roadbeds under dynamic water pressure as described in claim 1, characterized in that, A compression spring (711) is installed inside the inner groove (710), and the compression spring (711) is connected to the arc-shaped sliding plate (702).

3. The seepage stability protection structure for widened slopes of sandy roadbeds under dynamic water pressure as described in claim 1, characterized in that, An annular guide groove (708) is provided on the straight cylinder (705). The annular guide groove (708) is located between two adjacent shaped holes (707). A connecting hole (709) is provided at the bottom of the straight cylinder (705). The annular guide groove (708) is connected to the connecting hole (709).

4. The seepage stability protection structure for widened slopes of sandy roadbeds under dynamic water pressure as described in claim 3, characterized in that, When the arc-shaped sliding plate (702) is in its initial position, the liquid inlet (703) is directly connected to the strip hole (707) and is closed off from the annular guide groove (708); when the arc-shaped sliding plate (702) is squeezed and slides downward to the warning position, the liquid inlet (703) is closed off from the strip hole (707) and is directly connected to the annular guide groove (708). The water in the slope body (1) is directly discharged into the drain pipe (6) through the liquid inlet (703), the annular guide groove (708) and the connecting hole (709), realizing the switching between the filtered water path and the direct drainage path.

5. The seepage stability protection structure for widened slopes of sandy roadbeds under dynamic water pressure as described in claim 1, characterized in that, Each water quality sensor is independently installed at the connecting branch of the drainage pipe (6) corresponding to each diversion component (7). Each water quality sensor is independently numbered according to its location on the slope body (1) and recorded one by one with the corresponding installation location. When a water quality sensor detects that the turbidity of the water exceeds the set threshold, it sends a signal containing its number. The staff locates the corresponding diversion component (7) installation area according to the number, thereby accurately finding the specific location of soil subsidence.

6. The seepage stability protection structure for widened slopes of sandy roadbeds under dynamic water pressure as described in claim 1, characterized in that, A drainage ditch (3) is constructed on one side of the widened roadbed (2) to drain the accumulated water on the widened roadbed (2) into the drainage ditch (3).

7. A method for protecting the seepage stability of widened slopes in sandy roadbeds under dynamic water pressure, characterized in that... The method is applied to a slope seepage stabilization and protection structure as described in any one of claims 1-6 above, and the method includes the following steps: Step S1: During the roadbed widening construction, fix the fixing frame (5) on the slope body (1) to reinforce the slope body (1), and then install the diversion component (7) inside the slope body (1); Step S2: When the slope body (1) seeps water, the water seeping into the slope body (1) enters the straight cylinder (705) through the liquid inlet (703) of the arc-shaped slide plate (702) and the strip hole (707) of the straight cylinder (705). After being filtered by the porous foam plastic (8) in the straight cylinder (705), the water is discharged from the liquid outlet (706) of the straight cylinder (705) into the guide pipe (701), and finally discharged into the water collection tank (4) through the drain pipe (6). Step S3: Filter out the mud and sand in the water through porous foam plastic (8) to prevent the mud and sand from clogging the guide pipe (701).

8. The method for seepage stability protection of widened slopes of sandy roadbed under dynamic water pressure according to claim 7, characterized in that, The method further includes the following steps: Step S4: When the soil layer of the slope body (1) settles, the arc-shaped sliding plate (702) and the surrounding soil are relatively displaced. The squeezing effect of the soil on the arc-shaped sliding plate (702) gradually increases. When the squeezing effect exceeds the elastic force of the compression spring (711), the arc-shaped sliding plate (702) is pushed to slide down along the guide pipe (701). Step S5: As the arc-shaped slide plate (702) slides downward, the liquid inlet hole (703) on the arc-shaped slide plate (702) and the strip hole (707) on the straight cylinder (705) gradually become misaligned until they are completely closed, cutting off the filtration path into the porous foam plastic (8); at the same time, the liquid inlet hole (703) and the annular guide groove (708) on the straight cylinder (705) change from misaligned state to facing and connected state, and the water in the slope body (1) flows into the annular guide groove (708) through the liquid inlet hole (703), and then directly discharges into the drain pipe (6) through the connecting hole (709), realizing the switch from filtration drainage to direct discharge warning; Step S6: Since the water is not filtered by the porous foam plastic (8), it contains a lot of mud and sand and the water quality is poor. When the unfiltered water flows through the water quality sensor at the corresponding position in the drain pipe (6), the water quality sensor detects the abnormal turbidity and sends a signal containing the sensor number. Since each water quality sensor has been numbered and recorded according to its position on the slope body (1) during installation, after receiving the signal, the staff can directly determine the installation position of the corresponding flow guiding component (7) according to the sensor number, that is, the specific area of ​​soil subsidence, so as to reinforce the position in time and prevent the slope body (1) from collapsing.

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