Deep and thick covering layer scouring prevention structure and construction method
Through a deep covered anti-brush structure, including slope-mounted concrete, anti-shock wall and foot protection, the problem of the bank slope failure under the erosion of river water flow is solved, the stability and anti-slip capacity of the bank slope are improved, and the safety of the structure and rescue time are ensured.
Patent Information
- Application Number
- CN202510890398.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2025-08-19
AI Technical Summary
The existing shore slope protection structure is prone to failure under the erosion of river water flow, resulting in instability of the shore slope, especially underwater dumped stones and steel gabions, which are difficult to ensure quality and are prone to slip and loss.
A deep covered anti-brush structure is adopted, including slope-mounted concrete, anti-shock wall and foot protection. The slope-mounted concrete is set above the water surface line of the river channel. The anti-shock wall extends in the vertical direction and penetrates deep into the riverbed. The foot protection is located below the water surface line. Combined with drainage holes and steel bar design, a concrete structure with good sealing and anti-slip ability is formed.
It improves anti-slip performance, enhances the stability and anti-slip capability of the shore slope, ensures the safety and reliability of the structure, and can provide anti-slip support after the water flow is washed, and strives for rescue time.
Smart Images
Figure CN120505910A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of water conservancy and hydropower engineering, and in particular to a deep cover layer anti-scouring structure and a construction method. Background Art
[0002] The water flow downstream of a hydropower station's flood discharge structure is high, with large flow rates. The banks are susceptible to erosion by the high-speed currents. The strong impact of the currents can cause bank slope instability, endangering the foundations of downstream structures. Existing bank slope protection methods mainly include rock fill, reinforced gabions, and slope-mounted concrete. For areas below the waterline, rock fill and reinforced gabions are typically used. However, the quality of underwater fill construction is difficult to guarantee, and the structural foundations are still located in the river erosion zone. When the water erodes the riverbed, the rock fill and reinforced gabions are prone to slipping and dissipation, causing the bank slope protection structure to fail and, in turn, cause bank instability. Summary of the Invention
[0003] A first aspect of the present application provides a deep covering layer anti-scouring structure, which can improve the anti-scouring performance while taking into account a certain anti-slip ability.
[0004] The first aspect of the present application provides a deep cover layer anti-scouring structure comprising: slope-adhering concrete, the slope-adhering concrete being arranged on the slope side of the cover layer bank above the water surface line of the river channel, the slope-adhering concrete having a preset thickness; A crash wall, the crash wall being arranged at the foot of the slope of the slope-adhering concrete, the height direction of the crash wall extending in the vertical direction, the top side of the crash wall being connected to the slope-adhering concrete, and the bottom side extending to below the elevation of the boundary line between the base layer and the covering layer; A foot guard is provided on the bank slope of the covering layer on the side of the anti-scouring wall away from the slope concrete, the foot guard is at least partially located below the water surface line of the river channel, and the foot guard has a preset slope.
[0005] In addition, the deep cover anti-scouring structure provided by the present application may also have the following additional technical features: In an optional solution, a plurality of drainage holes are arranged at intervals in the slope-adhering concrete, and the drainage holes penetrate the slope-adhering concrete and extend to one side of the covering layer slope; the concrete strength of the slope-adhering concrete is C25, and a single layer of slope-adhering concrete steel bars is arranged in the slope-adhering concrete, and the preset thickness of the slope-adhering concrete is not less than 50 cm.
[0006] In an optional solution, the slope-fitting concrete is provided with multiple structural joints spaced apart along the length direction, the width of the structural joints is not less than 2 cm, and the structural joints are filled with asphalt pine boards; the drainage holes include PVC drainage pipes pre-buried in the slope-fitting concrete.
[0007] In an optional solution, the anti-collision wall is formed by drilling holes on a construction platform and pouring concrete. The concrete strength of the anti-collision wall is C30, and anti-collision wall steel bars are arranged in the anti-collision wall. The thickness of the anti-collision wall is 0.8m~1.2m.
[0008] In an optional solution, the foot guard is a plurality of stone blocks and / or concrete tetrahedrons disposed by dumping, the preset slope of the foot guard is 1:1.5, and the laying thickness is 1~2m; the slope of the slope-adhering concrete is 1:2.
[0009] A second aspect of the present application provides a construction method for constructing the deep cover anti-scouring structure provided in the first aspect, the construction method comprising the following steps: S1. Build a construction platform outside the bank slope to meet dry land construction conditions, and then construct the anti-scouring wall according to the design drawings; S2. Excavate the overburden slope according to the scope, height and slope ratio given in the design drawings; S3, using an excavator to dump stone blocks or concrete tetrahedrons on the cover layer slope below the water surface of the river channel outside the anti-scour wall to form a footing, and promptly re-survey the terrain after dumping and filling to ensure the quality of the dumping and filling construction; S4. Set up the formwork for the slope concrete, make and install the slope concrete reinforcement for the slope concrete, set drainage holes in the range of the slope concrete, and pour concrete.
[0010] In an optional solution, the construction of the anti-collision wall includes the following steps: Make the anti-collision wall reinforcement cage; construct the anti-collision wall slot according to the position given in the preset drawing, and use mud to consolidate the wall during the hole making process; use mud to clean the hole immediately after the hole making is completed, and the sediment thickness at the bottom of the hole shall not exceed 100mm, and the mud density index must meet the preset requirements; immediately hoist the anti-collision wall reinforcement cage after the hole cleaning is completed, set 4 lifting points on the anti-collision wall reinforcement cage, and hoist the anti-collision wall reinforcement cage in sections if it is too long, and weld it at the hole mouth; after the reinforcement cage is hoisted, conduct concealed engineering acceptance, and pour the anti-collision wall concrete after passing the acceptance.
[0011] In an optional solution, step S4 specifically includes the following steps: The preset position of the covering layer slope is excavated at a slope of 1:2, and then slope concrete is arranged. A structural joint with a width of 2 cm is set every 10 m, and the interior of the structural joint is filled with asphalt pine wood boards. A single layer of slope concrete steel bars is arranged inside the slope concrete. PVC drainage pipes are embedded in the range of the slope concrete and drainage holes are formed. Finally, concrete is poured.
[0012] The beneficial effects of this application are: The deep covering layer anti-scouring structure in this application forms a complete concrete anti-scouring structure by setting slope-mounted concrete, anti-scouring walls and toe guards. The structure has good structural sealing, strong concrete anti-scouring ability, and the anti-scouring structure is safe and reliable; the anti-scouring wall has a certain anti-slip ability. After the outer riverbed is scoured by water flow, the anti-scouring wall can provide anti-slip support for the bank slope on the inner side of the wall. The entire structure improves the anti-scouring performance while taking into account a certain anti-slip ability, which can to a certain extent buy valuable time for engineering rescue.
[0013] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A schematic cross-sectional view of the anti-scouring structure for the deep covering layer provided in this application; Figure 2 This is a vertical cross-section of the anti-collision wall reinforcement inside the anti-collision wall; Figure 3 This is the cross-sectional view of the steel bars of the first phase of the anti-collision wall; Figure 4 This is the cross-section diagram of the steel bars of the second phase of the anti-collision wall; Figure 5 This is the structural diagram of the slope concrete reinforcement arrangement within the slope concrete.
[0015] Reference numerals: slope-attached concrete 1, drainage hole 11, slope-attached concrete reinforcement 12, cover layer bank slope 2, anti-scour wall 3, anti-scour wall reinforcement 31, boundary line between base layer and cover layer 4, foot guard 5.
[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION
[0017] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0018] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other technical solutions obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0019] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.
[0020] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.
[0021] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.
[0022] like Figure 1-5 As shown, the first aspect of the embodiment of the present application provides a deep cover layer anti-scouring structure, which mainly includes a slope-attached concrete 1, a scouring wall 3, and a foot guard 5. The slope-attached concrete 1 is arranged on the slope side of the cover layer bank 2 above the water surface line of the river channel, and the slope-attached concrete 1 has a preset thickness; the scouring wall 3 is arranged at the slope foot side of the slope-attached concrete 1, and the height direction of the scouring wall 3 extends in the vertical direction, and the top side of the scouring wall 3 is connected to the slope-attached concrete 1, and the bottom side extends to below the elevation of the boundary line 4 between the base layer and the cover layer; the foot guard 5 is arranged on the cover layer bank 2 on the side of the scouring wall 3 away from the slope-attached concrete 1, and the foot guard 5 is at least partially located below the water surface line of the river channel, and the foot guard 5 has a preset slope.
[0023] like Figure 1 As shown, in this embodiment, a concrete cladding 1 is placed outside the overburden slope 2 above the waterline to improve the overall stability of the overburden slope. A scour wall 3 is placed outside the concrete cladding 1. The top of the wall 3 connects to the concrete cladding 1, and the bottom extends below the maximum scour depth in the overburden (the elevation of the boundary 4 between the base and overburden). The specific depth can be determined based on the requirements for anti-slip piles to provide anti-slip resistance for the overburden foundation. A foot guard 5 is installed outside the wall 3 on the overburden slope 2 below the waterline to protect it from high-speed water scouring and provide earth pressure for the wall 3.
[0024] The deep covering layer anti-scouring structure in this embodiment forms a complete concrete anti-scouring structure by arranging slope-attached concrete 1, anti-scouring wall 3 and foot guard 5. The structure has good structural sealing, strong anti-scouring ability of concrete, and safe and reliable anti-scouring structure; the anti-scouring wall 3 has a certain anti-slip ability. After the outer riverbed is scoured by water flow, the anti-scouring wall 3 can provide anti-slip support for the bank slope on the inner side of the wall. The entire structure improves the anti-scouring performance while taking into account a certain anti-slip ability, which can, to a certain extent, buy valuable time for engineering rescue.
[0025] like Figure 1 and Figure 5 As shown, in a specific embodiment, a plurality of drainage holes 11 are provided at intervals in the slope-adhering concrete 1. The drainage holes 11 penetrate the slope-adhering concrete 1 and extend to one side of the cover layer bank slope 2. The drainage holes 11 can reduce the water pressure in the soil, thereby preventing the stability of the cover layer from decreasing in the event of heavy rain or a sudden drop in water level. The concrete strength of the slope-adhering concrete 1 is C25, and a single layer of slope-adhering concrete steel bars 12 are provided in the slope-adhering concrete 1. The preset thickness of the slope-adhering concrete 1 is not less than 50 cm. In addition, the slope-adhering concrete 1 is provided with a plurality of structural joints at intervals along the length direction. The width of the structural joints is not less than 2 cm, and the structural joints are filled with asphalt pine wood boards; the drainage holes 11 include PVC drainage pipes pre-buried in the slope-adhering concrete 1.
[0026] like Figure 1-4 As shown, in a specific embodiment, the anti-scouring wall 3 is formed by drilling holes and pouring concrete on a construction platform. The concrete strength of the anti-scouring wall 3 is preferably C30, and anti-scouring wall reinforcement 31 is provided in the anti-scouring wall 3. Specifically, in this embodiment, the thickness of the anti-scouring wall 3 can be determined based on structural calculations and construction equipment conditions, and is preferably 0.8m~1.2m. In this embodiment, the height is 22m. The anti-scouring wall 3 can ensure dry land construction conditions by filling the construction platform. The anti-scouring wall 3 is formed by drilling holes and pouring concrete on the construction platform. The reinforced concrete wall has a strong anti-scouring ability and an anti-slip effect, which can effectively protect the stability of the covering layer slope 2. The anti-scouring wall 3 can not only effectively prevent the scouring of high-speed water flow in the flood discharge area, but also serve as a retaining wall to provide support for the foundation of the covering layer behind the wall, thereby enhancing the overall stability of the covering layer slope 2.
[0027] like Figure 1As shown, in one specific embodiment, the foot guard 5 is a dumped fill of multiple boulders and / or concrete tetrahedrons. The preset slope of the foot guard 5 is 1:1.5. The particle size of the large boulders or concrete tetrahedrons is designed to withstand the maximum flow velocity of the river channel, and the laying thickness is preferably 1m to 2m. This resists scouring by high-speed water flow while providing earth pressure for the anti-scouring wall 3. Large boulders are not easily damaged by water flow and can exert pressure on the bank cover, preventing scouring by water flow. Excavating the riverbed along the slope can save the amount of boulders. When boulders are insufficient, concrete tetrahedrons can be used instead. In addition, the slope of the slope concrete 1 is 1:2.
[0028] A second aspect of the present application provides a construction method for constructing the deep cover anti-scouring structure in the first aspect of the present application, the construction method comprising the following steps: S1. Build a construction platform outside the bank slope to meet dry land construction conditions, and then construct the anti-scouring wall 3 according to the design drawings. During construction, you can first make 31 cages of anti-scouring wall steel bars. According to the positions given in the preset drawings, construct the anti-scouring wall 3 slots. Use mud to consolidate the wall during the hole making process. Immediately after the hole is made, use mud to clean the hole. The thickness of the sediment at the bottom of the hole should not exceed 100mm, and the mud density index must meet the preset requirements. Immediately after the hole is cleaned, hoist the anti-scouring wall steel bar 31 cage, set four lifting points on the anti-scouring wall steel bar 31 cage. If the anti-scouring wall steel bar 31 cage is too long, hoist it in sections and weld it at the hole mouth. After the steel bar cage is hoisted, conduct a hidden project acceptance inspection. If it passes the inspection, pour the anti-scouring wall 3 concrete.
[0029] S2. Excavate the cover layer bank slope 2 according to the range, height and slope ratio given in the design drawings.
[0030] S3. Use an excavator to dump stones or concrete tetrahedrons on the cover layer slope 2 below the water surface of the river channel outside the anti-scour wall 3 to form a footing 5. After dumping and filling, re-survey the terrain in time to ensure the quality of the dumping and filling construction.
[0031] S4. Set up the formwork of the slope-adhering concrete 1, make and install the slope-adhering concrete steel bars 12 of the slope-adhering concrete 1, set drainage holes 11 within the range of the slope-adhering concrete 1, and pour concrete. It specifically includes the following steps: excavate the preset position of the cover layer slope 2 according to the slope of 1:2, then arrange the slope-adhering concrete 1, set a structural joint every 10m, the structural joint width of the structural joint is 2cm, and the internal structure of the structural joint is filled with asphalt pine wood boards, arrange a single layer of slope-adhering concrete steel bars 12 inside the slope-adhering concrete 1, pre-embed PVC drainage pipes within the range of the slope-adhering concrete 1 and form drainage holes 11, and finally pour concrete.
[0032] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.
Claims
1. A thick covering layer anti-scouring structure, characterized in that: include: Slope-fitting concrete, which is arranged on the slope side of the cover layer above the water surface line of the river channel, and has a preset thickness; A crash wall, the crash wall being arranged at the foot of the slope of the slope-adhering concrete, the height direction of the crash wall extending in the vertical direction, the top side of the crash wall being connected to the slope-adhering concrete, and the bottom side extending to below the elevation of the boundary line between the base layer and the covering layer; A foot guard is provided on the bank slope of the covering layer on the side of the anti-scouring wall away from the slope concrete, the foot guard is at least partially located below the water surface line of the river channel, and the foot guard has a preset slope.
2. The anti-scouring structure for a deep covering layer according to claim 1, characterized in that: A plurality of drainage holes are arranged at intervals in the slope-adhering concrete, and the drainage holes penetrate the slope-adhering concrete and extend to one side of the covering layer slope; the concrete strength of the slope-adhering concrete is C25, and a single layer of slope-adhering concrete steel bars is arranged in the slope-adhering concrete, and the preset thickness of the slope-adhering concrete is not less than 50 cm.
3. The anti-scouring structure for a deep covering layer according to claim 2, characterized in that: The slope-adhering concrete is provided with a plurality of structural joints at intervals along the length direction. The width of the structural joints is not less than 2 cm, and the structural joints are filled with asphalt pine wood boards; the drainage holes include PVC drainage pipes embedded in the slope-adhering concrete.
4. The anti-scouring structure for deep covering layer according to any one of claims 1 to 3, characterized in that: The anti-collision wall is formed by drilling holes on a construction platform and pouring concrete. The concrete strength of the anti-collision wall is C30, and anti-collision wall steel bars are arranged in the anti-collision wall. The thickness of the anti-collision wall is 0.8m~1.2m.
5. The anti-scouring structure for deep covering layer according to any one of claims 1 to 3, characterized in that: The foot guard is a plurality of stone blocks and / or concrete tetrahedrons disposed as dump fill. The preset slope of the foot guard is 1:1.5, and the laying thickness is 1-2m; the slope of the slope-adhering concrete is 1:
2.
6. A construction method for constructing the deep cover anti-scouring structure according to any one of claims 1 to 5, characterized in that: The construction method comprises the following steps: S1. Build a construction platform outside the bank slope to meet dry land construction conditions, and then construct the anti-scouring wall according to the design drawings; S2. Excavate the overburden slope according to the scope, height and slope ratio given in the design drawings; S3, using an excavator to dump stone blocks or concrete tetrahedrons on the cover layer slope below the water surface of the river channel outside the anti-scour wall to form a footing, and promptly re-survey the terrain after dumping and filling to ensure the quality of the dumping and filling construction; S4. Set up the formwork for the slope concrete, make and install the slope concrete reinforcement for the slope concrete, set drainage holes in the range of the slope concrete, and pour concrete.
7. The construction method according to claim 6, characterized in that: The construction of the anti-collision wall includes the following steps: Make the anti-collision wall reinforcement cage; construct the anti-collision wall slot according to the position given in the preset drawing, and use mud to consolidate the wall during the hole making process; use mud to clean the hole immediately after the hole making is completed, and the sediment thickness at the bottom of the hole shall not exceed 100mm, and the mud density index must meet the preset requirements; immediately hoist the anti-collision wall reinforcement cage after the hole cleaning is completed, set 4 lifting points on the anti-collision wall reinforcement cage, and hoist the anti-collision wall reinforcement cage in sections if it is too long, and weld it at the hole mouth; after the reinforcement cage is hoisted, conduct concealed engineering acceptance, and pour the anti-collision wall concrete after passing the acceptance.
8. The construction method according to claim 6, characterized in that: The step S4 specifically includes the following steps: The preset position of the covering layer slope is excavated at a slope of 1:2, and then slope concrete is arranged. A structural joint with a width of 2 cm is set every 10 m, and the interior of the structural joint is filled with asphalt pine wood boards. A single layer of slope concrete steel bars is arranged inside the slope concrete. PVC drainage pipes are embedded in the range of the slope concrete and drainage holes are formed. Finally, concrete is poured.