River bank slope retaining wall structure

Abstract

The utility model relates to a river bank slope retaining wall structure which comprises an existing retaining wall, the existing retaining wall is arranged close to a road, and an erosion emptying area is formed in a base of the existing retaining wall; the auxiliary supplementing wall is arranged on the front side, away from the road, of the existing retaining wall, the auxiliary supplementing wall is arranged between a river and the existing retaining wall, a landfill area is formed between the auxiliary supplementing wall and the existing retaining wall in a spaced mode, and the landfill area communicates with the erosion emptying area; and the reinforcing concrete is filled in the landfill area and the erosion emptying area. On one hand, the reinforcing concrete can rectify the inclined existing retaining wall to the vertical direction or the design direction, on the other hand, the reinforcing concrete poured into the backfilling area and the supplementary auxiliary wall can form lateral supporting and reinforcing on the existing retaining wall, the anti-sliding capacity and the anti-overturning capacity of the existing retaining wall are improved, and the service life of the retaining wall is prolonged. And the structural strength and stability of the existing retaining wall are enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of retaining walls, and in particular to a retaining wall structure on a river bank slope. Background Art

[0002] Gravity retaining walls rely on their own gravity to resist the sliding and overturning of the soil behind the wall. They are generally cast as a whole using blocks, slabs, concrete and other materials. They are relatively simple to build, easy to construct, and materials are readily available. They have good technical and economic benefits. Therefore, gravity retaining walls have been widely used in highways.

[0003] In hilly and mountainous areas, the direction of the highway is often roughly the same as that of the nearby river. During heavy rains, the river flow is large, the river level rises and often spreads to the underground of the retaining wall, and the river water is very turbulent. The turbulent river carries gravel and boulders of varying diameters, as well as ice or other drifting objects when the ice and snow melt in spring and winter, which impact the riverbank protection structure. Under the long-term scouring and erosion of river water and the impact of other external objects, the foundation of the retaining wall will be eroded and hollowed out due to insufficient anti-scouring capacity. In this way, the retaining wall will tilt outward as a whole, and the road surface behind the wall will crack. In the long run, it will cause the highway subgrade to collapse, posing a potential serious risk of safety accidents. Summary of the invention

[0004] Based on this, it is necessary to provide a river bank slope retaining wall structure to address the problem of road cracking caused by the outward inclination of the retaining wall and the potential safety hazard of highway roadbed collapse.

[0005] The present application provides a river bank slope retaining wall structure, which comprises:

[0006] An existing retaining wall, wherein the existing retaining wall is arranged adjacent to the highway, and an erosion hollowing area is formed at the base of the existing retaining wall;

[0007] an additional auxiliary wall, the additional auxiliary wall being disposed at the front side of the existing retaining wall away from the highway, and the additional auxiliary wall being arranged between the river and the existing retaining wall, a landfill area being formed between the additional auxiliary wall and the existing retaining wall, and the landfill area being connected to the erosion hollowing area; and

[0008] Reinforced concrete is filled in the landfill area and the erosion hollowing area.

[0009] In the retaining wall structure of the riverbank slope of this solution, due to the long-term scouring by the rapid river water and the impact of objects such as stones in the river water, an eroded and hollowed area will be formed at the base of the existing retaining wall, so that the existing retaining wall will tilt outward in the direction away from the highway, resulting in cracks in the highway pavement and causing the collapse of the highway subgrade. In response to this, in this application, an additional auxiliary wall is built on the front side of the existing retaining wall away from the highway, that is, the additional auxiliary wall is located between the river and the existing retaining wall, and then reinforced concrete is poured into the eroded and hollowed area and the landfill area, so that the reinforced concrete can connect the existing retaining wall and the additional auxiliary wall into one body after solidification. In this way, on the one hand, the reinforced concrete poured into the eroded and hollowed area can correct the tilted existing retaining wall to the vertical or the designed direction. On the other hand, the reinforced concrete poured into the backfill area and the additional auxiliary wall can form lateral support and reinforcement for the existing retaining wall, improving the anti-sliding ability and anti-overturning ability of the existing retaining wall, and enhancing the structural strength and stability of the existing retaining wall. Moreover, the additional auxiliary wall is separated between the existing retaining wall and the river, which can prevent the rapid river water and objects such as stones in the river water from scouring and impacting the base of the existing retaining wall, further ensuring the safety and reliability of the existing retaining wall.

[0010] The technical solution of this application will be further described below:

[0011] In one embodiment, the additional auxiliary wall is inclined, and the inclined direction of the additional auxiliary wall is towards the existing retaining wall, and the slope of the back of the additional auxiliary wall is 1:0.25.

[0012] In one embodiment, the lower end of the additional auxiliary wall is embedded in the riverbed of the river, and the embedded depth is more than 1m greater than the riverbed scouring depth at the same position.

[0013] In one embodiment, the top of the reinforced concrete exceeds the top of the additional auxiliary wall, and the part of the reinforced concrete exceeding the top of the additional auxiliary wall is close to the existing retaining wall and forms a chamfer.

[0014] In one embodiment, the horizontal distance between the existing retaining wall and the additional auxiliary wall is 0.5m to 1.0m.

[0015] In one embodiment, the retaining wall structure of the riverbank slope further includes at least one first ribbed anchor rod, one end of the first ribbed anchor rod is anchored in the existing retaining wall, and the other end of the first ribbed anchor rod is buried in the soil behind the existing retaining wall.

[0016] In one embodiment, the retaining wall structure of the riverbank slope further includes at least one second ribbed anchor rod, one end of the second ribbed anchor rod is anchored in the additional auxiliary wall, and the other end of the second ribbed anchor rod is buried in the soil under the base of the existing retaining wall;

[0017] Among them, the soil mass has a most dangerous slip surface, and the lengths of the first ribbed anchor rods exceeding the most dangerous slip surface are all set as l m ; the lengths of the second ribbed anchor rods exceeding the most dangerous slip surface are all set as l n .

[0018] In one embodiment, the existing retaining wall is provided with a first drainage hole penetrating through the opposite side walls in the thickness direction of the existing retaining wall.

[0019] In one embodiment, the supplementary secondary wall is provided with a second drainage hole penetrating through the opposite side walls in the thickness direction of the supplementary secondary wall, and the reinforced concrete is provided with a water passing hole communicating with the first drainage hole and the second drainage hole.

[0020] In one embodiment, the bank slope retaining wall structure further includes a ladder, the upper end of the ladder extends and is fixed to the upper end side of the existing retaining wall, and the lower end of the ladder is fixed to the top of the supplementary secondary wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation to this application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic cross-sectional structure diagram of the bank slope retaining wall structure according to an embodiment of this application.

[0024] Figure 2 It is a side view structure diagram of the bank slope retaining wall structure in an embodiment.

[0025] Figure 3 It is a top view structure diagram of the bank slope retaining wall structure in an embodiment.

[0026] Figure 4 It is a schematic diagram for calculating the anti-slip stability of the existing retaining wall.

[0027] Figure 5 It is a force analysis diagram for calculating the anti-slip stability of the existing retaining wall.

[0028] Figure 6 It is a schematic diagram for calculating the anti-overturning stability of the existing retaining wall.

[0029] Description of Reference Numerals

[0030] 100, Riverbank Slope Retaining Wall Structure; 10, Existing Retaining Wall; 11, Erosion and Hollowing Area; 12, First Drainage Hole; 20, Supplementary Sub-Wall; 21, Second Drainage Hole; 30, Landfill Area; 40, Reinforced Concrete; 41, Chamfer; 42, Water Passage Hole; 50, First Rib Anchor Bolt; 60, Second Rib Anchor Bolt; 70, Ladder; 80, Most Dangerous Slip Surface; 200, Highway; 300, River. Detailed Implementation Manner

[0031] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the detailed implementation manner of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0033] In addition, if these terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plural" appears, the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0034] In this application, unless otherwise clearly specified or limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly specified or limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0036] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0037] Refer to Figures 1 to 3 , a kind of riverside slope retaining wall structure 100 shown in an embodiment of this application, which includes an existing retaining wall 10, a supplementary secondary wall 20 and a reinforced concrete 40. Among them, the existing retaining wall 10 can be considered as a shoulder retaining wall. A shoulder refers to the slope area at the edge of the road surface, which often plays a role in support and protection. Therefore, a shoulder retaining wall refers to a retaining wall structure built on the shoulder to protect the stability and safety of the road surface of the highway 200.

[0038] Furthermore, after the existing retaining wall 10 is arranged adjacent to the road 200, the existing retaining wall 10 is also arranged adjacent to the river 300 on one side of the road 200 and consistent with the orientation of the road 200. After being washed by the river water of the river 300 and impacted by objects such as stones in the river 300 for a long time, an erosion and hollowing area 11 will be formed at the base of the existing retaining wall 10. That is, the soil at the base of the existing retaining wall 10 will be washed away by the river water, resulting in the formation of a cavity in a region on one side of the base of the existing retaining wall 10. The existing retaining wall 10 loses the longitudinal support of the soil in this region, leading to the existing retaining wall 10 tilting outward in the direction away from the road 200. In this way, the existing retaining wall 10 will lose its function of enclosing the road surface, causing the road surface to crack and the roadbed to collapse. This is the reason for the technical problems existing in this application.

[0039] In this solution, the supplementary retaining wall 20 is arranged on the front side of the existing retaining wall 10 away from the road 200, and the supplementary retaining wall 20 is arranged between the river 300 and the existing retaining wall 10. A landfill area 30 is formed at an interval between the supplementary retaining wall 20 and the existing retaining wall 10, and the landfill area 30 is communicated with the erosion and hollowing area 11; the reinforced concrete 40 is filled in the landfill area 30 and the erosion and hollowing area 11.

[0040] In summary, implementing the technical solution of this embodiment will have the following beneficial effects: In the riverside slope retaining wall structure 100 of this solution, due to being washed by the rapid river water and impacted by objects such as stones in the river water for a long time, an erosion and hollowing area 11 will be formed at the base of the existing retaining wall 10, so that the existing retaining wall 10 tilts outward in the direction away from the road 200, resulting in the cracking of the road surface of the road 200 and the collapse of the roadbed of the road 200. In response to this, in this application, a supplementary retaining wall 20 is built on the front side of the existing retaining wall 10 away from the road 200, that is, the supplementary retaining wall 20 is located between the river 300 and the existing retaining wall 10, and then the reinforced concrete is poured into the erosion and hollowing area 11 and the landfill area 30, so that the reinforced concrete 40 can connect the existing retaining wall 10 and the supplementary retaining wall 20 into one body after solidification. In this way, on the one hand, the reinforced concrete 40 poured into the erosion and hollowing area 11 can correct the tilted existing retaining wall 10 to the vertical or the designed direction, and on the other hand, the reinforced concrete 40 poured into the backfill area and the supplementary retaining wall 20 can form lateral support and reinforcement for the existing retaining wall 10, improving the anti-slip ability and anti-overturning ability of the existing retaining wall 10 and enhancing the structural strength and stability of the existing retaining wall 10; furthermore, the supplementary retaining wall 20 is blocked between the existing retaining wall 10 and the river 300, which can prevent the rapid river water and objects such as stones in the river from scouring and impacting the base of the existing retaining wall 10, further ensuring the safety and reliability of the existing retaining wall 10.

[0041] In this application, the existing retaining wall 10 is also inclined. However, the existing retaining wall 10 is inclined in the direction away from the road 200 (i.e., in the direction towards the river 300). This is beneficial for the road 200 to obtain a wider roadbed, improving the support reliability of the roadbed for the road surface. At the same time, a wider road surface can also be obtained, enhancing the traffic capacity of the road 200.

[0042] In one embodiment, the supplementary secondary wall 20 is inclined, and the inclination direction of the supplementary secondary wall 20 is towards the existing retaining wall 10. The slope of the back of the supplementary secondary wall 20 is 1:0.25. With this setting, the supplementary secondary wall 20 is not likely to incline outward in the direction towards the river 300, which helps to ensure the structural stability of the supplementary secondary wall 20 itself and its support and protection performance for the existing retaining wall 10. In addition, it can also reduce the scouring of the fast-flowing river water on the supplementary secondary wall 20.

[0043] Optionally, the supplementary secondary wall 20 is made of fine aggregate concrete above C30.

[0044] When constructing the supplementary secondary wall 20, the lower end of the supplementary secondary wall 20 needs to be embedded into the riverbed of the river 300, and the embedding depth is greater than the riverbed scouring depth at the same position by no less than 1 m. This ensures the installation strength and stability of the supplementary secondary wall 20 and prevents it from slipping and toppling when subjected to the inner extrusion forces from the existing retaining wall 10, the inner soil mass, etc.

[0045] Preferably, the top end of the supplementary secondary wall 20 should reach at least half or close to half of the height of the existing retaining wall 10, so as to ensure that there is sufficient reinforced concrete 40 and the supplementary secondary wall 20 to form lateral support for the existing retaining wall 10.

[0046] Please continue to refer to Figure 1 , further, on the basis of any of the above embodiments, the top end of the reinforced concrete 40 extends beyond the top of the wall of the supplementary secondary wall 20, and the part of the reinforced concrete 40 that extends beyond the top of the wall of the supplementary secondary wall 20 is close to the existing retaining wall 10 and forms a chamfer 41. In actual use, the reinforced concrete 40 will be subjected to the extrusion force applied from the inside by the existing retaining wall 10. When the part of the reinforced concrete 40 that extends beyond the top of the wall of the supplementary secondary wall 20 is close to the existing retaining wall 10 and forms a chamfer 41, it can avoid stress concentration causing cracking and damage to the reinforced concrete 40, affecting the support and retaining ability of the reinforced concrete 40 for the existing retaining wall 10.

[0047] In yet another embodiment, the horizontal distance between the existing retaining wall 10 and the supplementary secondary wall 20 is 0.5 m to 1.0 m. Within this horizontal spacing range, it will neither cause the distance between the supplementary secondary wall 20 and the existing retaining wall 10 to be too close, resulting in an overly thin thickness of the reinforced concrete 40 and weakening the supporting performance of the reinforced concrete 40 for the existing retaining wall 10, nor cause the distance between the supplementary secondary wall 20 and the existing retaining wall 10 to be too far, resulting in excessive consumption and surplus of the reinforced concrete 40, causing high costs and low economy, and leading to the supplementary secondary wall 20 being too close to the river channel of the river 300, and the riverbed soil at the installation position of the supplementary secondary wall 20 being too soft to reliably fix the supplementary secondary wall 20.

[0048] Please continue to refer to Figure 1 and Figure 2 In addition, on the basis of any of the above embodiments, the riverbank slope retaining wall structure 100 further includes at least one first ribbed anchor rod 50. One end of the first ribbed anchor rod 50 is anchored in the existing retaining wall 10, and the other end of the first ribbed anchor rod 50 is buried in the soil behind the existing retaining wall 10. Preferably, a plurality of first ribbed anchor rods 50 are provided, and the plurality of first ribbed anchor rods 50 are evenly arranged at equal intervals along the height direction of the existing retaining wall 10. By installing the first ribbed anchor rod 50, the existing retaining wall 10 can be reinforced, effectively improving the anti-slip and anti-overturning capabilities of the existing retaining wall 10.

[0049] Please continue to refer to Figure 1 and Figure 2 Furthermore, the riverbank slope retaining wall structure 100 further includes at least one second ribbed anchor rod 60. One end of the second ribbed anchor rod 60 is anchored in the supplementary secondary wall 20, and the other end of the second ribbed anchor rod 60 is buried in the soil below the base of the existing retaining wall 10. Similarly, by installing the second ribbed anchor rod 60, the supplementary secondary wall 20 can be reinforced, effectively improving the anti-slip and anti-overturning capabilities of the supplementary secondary wall 20.

[0050] Optionally, a plurality of second ribbed anchor rods 60 are provided. The plurality of second ribbed anchor rods 60 can be arranged at intervals along the height direction of the supplementary secondary wall 20, or can be arranged at intervals along the length direction of the supplementary secondary wall 20 (i.e., the direction consistent with the extension direction of the road 200), and can be flexibly selected according to actual needs.

[0051] For example, in this application, the inclination angles of both the first ribbed anchor rod 50 and the second ribbed anchor rod 60 are 10° to 30°, and they are HRB400 steel bars with a diameter of 28 mm to 40 mm.

[0052] Please continue to refer to Figure 1 wherein, the soil has the most dangerous slip surface 80, and the length of the first ribbed anchor rod 50 exceeding the most dangerous slip surface 80 is set to l m; The length of the second rib anchor rod 60 exceeding the most dangerous slip surface 80 is set to l n . This helps to ensure that the anchoring lengths of the first rib anchor rod 50 and the second rib anchor rod 60 with the soil mass are sufficient.

[0053] Please continue to refer to Figures 4 to 6 , and the anti-slip stability coefficient of the existing retaining wall 10 after being reinforced with anchor rods is set to F s , and the anti-overturning stability coefficient is F t ; The anti-slip stability coefficient of the original existing retaining wall 10 is set to F s0 , and the anti-overturning stability coefficient is F t0 ; Satisfy F S ≥F S0 , F t ≥F t0 . Let the self-weight of the existing retaining wall 10 per unit width be G (Kn / m), the earth pressure of the soil mass behind the wall be E a (kN / m), and the external load pressure be E q (kN / m). The tensile force per unit width provided by the anchor rod along the horizontal direction of the existing retaining wall 10 is T (unit: kN / m), the horizontal inclination angle of the anchor rod is α, the friction angle between the soil behind the wall and the existing retaining wall 10 is δ, and the friction coefficient between the soil at the base and the base of the existing retaining wall 10 is μ. Let E = E a +E q .

[0054] Ignoring the beneficial effects of the fine aggregate concrete backfilled in front of the existing retaining wall 10 and the auxiliary wall, the anti-slip stability calculation formula of the existing retaining wall 10 is as follows:

[0055] (1)

[0056] The anti-overturning stability calculation formula of the existing retaining wall 10 is as follows:

[0057] (2)

[0058] In the formula: x G is the horizontal distance from the centroid of the existing retaining wall 10 to the toe of the wall (m), x E is the horizontal distance from the action point of the earth pressure E of the soil mass behind the wall to the toe of the wall (m), z E is the vertical distance from the action point of the earth pressure E of the soil mass behind the wall to the toe of the wall (m), x T is the horizontal distance from the action point of the resultant force of the anchor rod per unit width to the toe of the wall (m), z T is the vertical distance from the action point of the resultant force of the anchor rod per unit width to the toe of the wall (m).

[0059] Give the required anti-slip stability coefficient F s and anti-overturning stability coefficient F t, after obtaining two different values of T according to the formulas (1) and (2) respectively, take the larger value of T.

[0060] The horizontal spacing of the anchor bolts is S x (unit: m), and the tensile force of a single anchor bolt is T s (unit: kN), then:

[0061] (3)

[0062] The lengths of the anchor bolt anchor bodies and the rock and soil layers satisfy the following two formulas:

[0063] (4)

[0064] D is the diameter of the anchor bolt borehole (unit: m), f rbk is the standard value of the ultimate bond strength between the rock and soil layer and the anchor body (unit: kPa);

[0065] The anchorage length between the anchor bolt rod body and the anchoring mortar satisfies the following formula:

[0066] (5)

[0067] d is the diameter of the anchor bolt (unit: m), f b is the design value of the bond strength between the anchor bolt steel bar and the anchoring mortar (unit: kPa).

[0068] Finally, l a Take the larger value calculated from formulas (5) and (6).

[0069] The length l of the anchor bolts of the existing retaining wall 10 entering the most dangerous slip surface 80 of the soil behind the wall m should be greater than or equal to l a .

[0070] The length l of the second rib anchor bolt 60 embedded in the stable soil layer (excluding soft soil layer and liquefied sand layer) n should be greater than or equal to 4m.

[0071] In one embodiment, the specific construction process of the first ribbed anchor rod 50 and the second ribbed anchor rod 60 is as follows: First, use a drilling rig to form a hole with a diameter of 150 mm to 200 mm. Then, install the anchor rod into the hole and ensure that the anchor rod is located at the center position of the drilling hole. The grouting pipe is placed into the hole together with the anchor rod body, and the end of the pipe is 50 mm to 100 mm away from the bottom of the hole. Grouting is carried out using a grouting process from the bottom of the hole upwards, and neat cement slurry prepared with 42.5-grade ordinary Portland cement is used, with a water-cement ratio of 0.50 to 0.55. The secondary pressure grouting process is used for construction. The first normal pressure grouting pressure is 0.5 Mpa. Start grouting from the bottom of the hole. When the cement slurry emerging from the hole mouth is the same as the fresh slurry, continue grouting for another 2 minutes. After the first grouting starts to set (6 to 8 hours), carry out the second grouting. The outlet of the secondary grouting pipe should have a check structure. The grouting pressure should be greater than 2.0 MPa, and the termination grouting pressure should not be less than 1.5 MPa. During grouting, pay attention to observing the ground conditions around the slope to prevent spraying and leakage of slurry.

[0072] In addition, in another embodiment, the existing retaining wall 10 is provided with a first drain hole 12 that penetrates through the opposite side walls in the thickness direction of the existing retaining wall 10. Therefore, through the first drain hole 12, rainwater, groundwater, etc. in the soil behind the existing retaining wall 10 can be discharged in time, avoiding the soil being softened by water infiltration and reducing the structural strength.

[0073] Furthermore, the supplementary secondary wall 20 is provided with a second drain hole 21 that penetrates through the opposite side walls in the thickness direction of the supplementary secondary wall 20, and the reinforced concrete 40 is provided with a water passing hole 42 that communicates with the first drain hole 12 and the second drain hole 21. Therefore, rainwater, groundwater, etc. in the soil behind the lower part of the existing retaining wall 10 can smoothly pass through the reinforced concrete 40 and the supplementary secondary wall 20 and be discharged in time and effectively, avoiding the soil being softened by water infiltration and reducing the structural strength.

[0074] Please continue to refer to Figure 1 , in order to facilitate later maintenance and cleaning of floating objects such as stones in the river channel, the riverside slope retaining wall structure 100 further includes a ladder 70. The upper end of the ladder 70 extends and is fixed to the upper side of the existing retaining wall 10, and the lower end of the ladder 70 is fixed to the top of the supplementary secondary wall 20.

[0075] Specifically, the width of the ladder 70 is about 0.5 m. The ladder 70 is inclined, and the slope ratio of the ladder 70 is 1:1 or 1:0.75. Iron handrails are provided on both sides of the ladder 70, and the height of the handrails is about 1 m.

[0076] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0077] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A river bank slope retaining wall structure, characterized in that: include: An existing retaining wall, wherein the existing retaining wall is arranged adjacent to the highway, and an erosion hollowing area is formed at the base of the existing retaining wall; An additional auxiliary wall, the additional auxiliary wall is arranged on the front side of the existing retaining wall away from the highway, and the additional auxiliary wall is arranged between the river and the existing retaining wall, a landfill area is formed between the additional auxiliary wall and the existing retaining wall, and the landfill area is connected to the erosion hollowing area; as well as Reinforced concrete is filled in the landfill area and the erosion hollowing area.

2. The river bank slope retaining wall structure according to claim 1, characterized in that: The supplementary auxiliary wall is inclined, and the inclination direction of the supplementary auxiliary wall is toward the existing retaining wall. The slope of the back of the supplementary auxiliary wall is 1:0.

25.

3. The river bank slope retaining wall structure according to claim 1, characterized in that: The lower end of the supplementary auxiliary wall is embedded in the riverbed of the river, and the embedding depth is at least 1m greater than the scouring depth of the riverbed at the same position.

4. The river bank slope retaining wall structure according to claim 1, characterized in that: The top of the reinforced concrete exceeds the top of the supplementary auxiliary wall, and the portion of the reinforced concrete exceeding the top of the supplementary auxiliary wall is close to the existing retaining wall and is chamfered.

5. The river bank slope retaining wall structure according to claim 1, characterized in that: The horizontal distance between the existing retaining wall and the additional auxiliary wall is 0.5m to 1.0m.

6. The river bank slope retaining wall structure according to claim 1, characterized in that: The river bank slope retaining wall structure also includes at least one first rib anchor rod, one end of which is anchored in the existing retaining wall, and the other end of which is buried in the soil behind the existing retaining wall.

7. The river bank slope retaining wall structure according to claim 6, characterized in that: The river bank slope retaining wall structure further includes at least one second rib anchor rod, one end of which is anchored in the supplementary auxiliary wall, and the other end of which is buried in the soil below the base of the existing retaining wall; The soil has a most dangerous sliding surface, and the length of the first rib anchor rod exceeding the most dangerous sliding surface is set to l m The length of the second rib anchor rod exceeding the most dangerous sliding surface is set to l n .

8. The river bank slope retaining wall structure according to claim 1, characterized in that: The existing retaining wall is provided with a first drainage hole penetrating through the walls on two opposite sides in the thickness direction of the existing retaining wall.

9. The river bank slope retaining wall structure according to claim 8, characterized in that: The supplementary auxiliary wall is provided with a second drainage hole penetrating through the walls on opposite sides in the thickness direction of the supplementary auxiliary wall, and the reinforced concrete is provided with a water hole connecting the first drainage hole and the second drainage hole.

10. The river bank slope retaining wall structure according to claim 1, characterized in that: The river bank slope retaining wall structure also includes a ladder, the upper end of which extends and is fixed to the upper end side of the existing retaining wall, and the lower end of which is fixed to the top of the supplementary auxiliary wall.

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