Dam foundation drainage structure of bank slope dam section
By tilting the drainage holes and water diversion steel pipe structures on the bank slope, the problem of the pre-buried drainage holes of the gate pier affecting the construction progress and safety hazards, and the effect of effectively reducing lifting pressure and construction safety is achieved.
Patent Information
- Application Number
- CN202510722120.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2025-08-15
AI Technical Summary
In the prior art, the pre-embedded drainage holes of the gate pier affect the construction progress and there is a safety hazard of concrete erosion damage, making it difficult to effectively reduce the lifting pressure of the water barrier dam.
The drainage hole and water diversion steel pipe structure are adopted. The drainage hole is arranged inclinedly within the bank slope. The water diversion steel pipe is connected on the slope, including the water diversion main pipe and branch pipe to avoid passing through the gate pier. The water is drained downstream through the water diversion steel pipe, and the geotextile and M10 cement mortar are sealed to ensure the construction progress and the integrity of the gate pier.
It effectively reduces lifting pressure without affecting the construction progress, avoids damage to the concrete of the gate pier, and ensures construction safety and drainage effect.
Smart Images
Figure CN120486327A_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 dam foundation drainage structure for a bank slope dam section. Background Art
[0002] In water conservancy and hydropower projects, bank slope retaining dam sections are often installed on both sides of discharge structures such as sluice gates and overflow dams. The uplift pressure from the dam foundation and bank slope is one of the main loads acting on the retaining dam section, significantly affecting the dam's anti-sliding stability and stress. To reduce the adverse effects of uplift pressure, drainage holes are usually installed on the bank slope and the drainage is directed into the gate chamber through pre-buried drainage pipes in the gate piers. However, pre-buried drainage holes in the gate piers can affect the concrete pouring progress, and high-speed water flow can easily cause scouring and damage to the gate pier concrete when the holes are opened, posing certain safety risks. Summary of the Invention
[0003] The present application provides a bank slope dam section dam foundation drainage structure, which can effectively drain water from the dam foundation and bank slope without affecting the construction progress, thereby reducing uplift pressure.
[0004] The bank slope dam section foundation drainage structure provided in the present application includes: drainage channels, the drainage channels being arranged in the bank slope and gradually sloping downward from the bank slope toward the dam body side, the drainage channels being in a plurality and being arranged in a plum blossom shape at intervals on the bank slope; Multiple groups of water diversion steel pipes are arranged on the slope surface of the bank slope, and one group of water diversion steel pipes is correspondingly arranged on the slope surface of the first-level bank slope; one group of water diversion steel pipes includes a water diversion main pipe and multiple water diversion branch pipes, the length direction of the water diversion branch pipes extends along the height direction of the bank slope and connects multiple drainage channels on the same straight line, multiple water diversion branch pipes are arranged at intervals along the extension direction of the bank slope, the water diversion main pipe is located at the bottom of the first-level bank slope, and the water diversion main pipe connects multiple water diversion branch pipes.
[0005] In addition, the bank slope dam section foundation drainage structure provided in this application may also have the following additional technical features: In an optional solution, the water diversion steel pipe also includes a plurality of water diversion connecting pipes, which at least partially extend into the drainage channel and connect the orifice of the drainage channel and the water diversion branch pipe; the pipe mouth of the water diversion connecting pipe is wrapped with geotextile, and the gap between the outer peripheral wall of the water diversion connecting pipe and the drainage channel is sealed by M10 cement mortar.
[0006] In an optional solution, the water diversion branch pipe is connected to the water diversion main pipe through a reducing two-way pipe or a reducing three-way pipe, the water diversion main pipe is a DN200 galvanized steel pipe, and the water diversion branch pipe and / or the water diversion connecting pipe is a DN80 galvanized steel pipe.
[0007] In an optional solution, the drainage channel is inclined at an angle of 10° from the bank slope to one side of the dam body, and multiple drainage channels are arranged in a plum blossom shape with equal intervals; the water main pipe is coated with an asphalt layer on the pipe wall on both sides of the structural seam across the bank slope and / or the dam body, and the length of the asphalt layer is 1m.
[0008] In an optional solution, the water main pipe and the water branch pipe are fixed to the excavation surface of the slope by stainless steel bars and nails respectively. The stainless steel bars radially span the water main pipe or the water branch pipe and are close to the excavation surface. The nails will fix the stainless steel bars.
[0009] The beneficial effects of this application are: The bank slope dam section foundation drainage structure in this application drains the water from the dam foundation and the bank slope through drainage channels, main water pipes and branch water pipes arranged on the bank slope, thereby reducing the uplift pressure. In addition, this drainage method can eliminate the need for the drainage pipe to pass through the gate pier, resulting in minimal construction interference, which will not affect the overall concrete pouring progress, and can ensure the integrity of the gate pier surface, thereby avoiding damage to the gate pier concrete caused by high-speed water flow.
[0010] 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
[0011] Figure 1 This is a schematic diagram of the planar layout of the bank slope dam section dam foundation drainage structure in a specific embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the bank slope dam section dam foundation drainage structure at AA; Figure 3 This is a schematic diagram of the connection structure between the drainage channel and the water diversion steel pipe in a specific embodiment; Figure 4 Schematic diagram of the connection structure of the water main pipe and the water branch pipe in a specific embodiment; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the water main and water branch pipes at BB.
[0012] Figure numerals: drainage channel 1, bank slope 2, dam body 3, water diversion steel pipe 4, water diversion main pipe 41, water diversion branch pipe 42, water diversion connecting pipe 43, reducing two-way pipe 5, reducing three-way pipe 6, stainless steel bar 7, nails 8, excavation surface 9.
[0013] 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
[0014] 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.
[0015] 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.
[0016] 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.
[0017] 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.
[0018] 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.
[0019] like Figure 1-5As shown, the embodiment of the present application provides a bank slope dam section dam foundation drainage structure, which mainly includes a drainage channel 1 and multiple groups of water diversion steel pipes 4, wherein the drainage channel 1 is arranged in the bank slope 2, and the drainage channel 1 gradually slopes downward from the bank slope 2 to the side of the dam body 3, the number of the drainage channels 1 is multiple, and the multiple drainage channels 1 are arranged in a plum blossom shape on the bank slope 2; the water diversion steel pipes 4 are arranged on the slope surface of the bank slope 2, and a group of water diversion steel pipes 4 are correspondingly arranged on the slope surface of the first-level bank slope 2; a group of water diversion steel pipes 4 includes It includes a water diversion main pipe 41 and multiple water diversion branch pipes 42. The length direction of the water diversion branch pipes 42 extends along the height direction of the bank slope 2 and connects multiple drainage channels 1 on the same straight line. The multiple water diversion branch pipes 42 are arranged at intervals along the extension direction of the bank slope 2. The water diversion main pipe 41 is located at the bottom of the first-level bank slope 2. The water diversion main pipe 41 is connected to multiple water diversion branch pipes 42. The water diversion main pipe 41 extends downstream to outside the concrete range. The water diversion branch pipes 42 draw water from the drainage channels 1 and gather it into the water diversion main pipe 41. The water diversion main pipe 41 discharges the water downstream.
[0020] The bank slope dam section foundation drainage structure in this embodiment drains the water from the retaining dam foundation and the bank slope 2 through the drainage channel 1, the water diversion main pipe 41 and the water diversion branch pipe 42 arranged on the bank slope 2, thereby reducing the uplift pressure. In addition, such a drainage method can make it unnecessary for the drainage pipe to pass through the gate pier, resulting in little construction interference, which will not affect the overall concrete pouring progress, and can ensure the integrity of the gate pier surface, avoiding damage to the gate pier concrete caused by high-speed water flow.
[0021] like Figure 2-3 As shown, in a specific embodiment, the water diversion steel pipe 4 further includes a plurality of water diversion pipes 43, which at least partially extend into the drainage channel 1 and connect the orifice of the drainage channel 1 and the water diversion branch pipe 42. Generally speaking, the length of the water diversion pipe 43 extending into the drainage channel 1 is 20 cm. The pipe opening of the water diversion pipe 43 is wrapped with a geotextile, and the gap between the outer wall of the water diversion pipe 43 and the drainage channel 1 is sealed with M10 cement mortar. The geotextile can prevent mud and sand from entering the water diversion pipe 43, while the M10 cement mortar that seals the gap can prevent water leakage.
[0022] like Figure 4 As shown, in a specific embodiment, the water diversion branch pipes 42 are connected to the water diversion main pipe 41 via a reducing two-way pipe 5 or a reducing three-way pipe 6. The water diversion main pipe 41 is a DN200 galvanized steel pipe, and the water diversion branch pipes 42 and / or the water diversion main pipe 43 are DN80 galvanized steel pipes. Specifically, the two water diversion branch pipes 42 at the outermost edges can be connected to the water diversion main pipe 41 via the reducing two-way pipe 5, while the water diversion branch pipes 42 at other locations can be connected to the water diversion main pipe 41 via the reducing three-way pipe 6.
[0023] like Figure 1-3 As shown, in a specific embodiment, the drainage channel 1 is inclined at an angle of 10° from the bank slope 2 to the dam body 3, and multiple drainage channels 1 are arranged in a plum blossom shape with equal intervals; the water main 41 is coated with an asphalt layer on the pipe wall on both sides of the structural seam crossing the bank slope 2 and / or the dam body 3, and the length of the asphalt layer is 1m.
[0024] like Figure 3-5 As shown, in a specific embodiment, the water main pipe 41 and the water branch pipe 42 are fixed to the excavation surface 9 of the slope 2 by stainless steel bars 7 and nails 8 respectively. The stainless steel bars 7 radially span the water main pipe 41 or the water branch pipe 42 and are close to the excavation surface 9. The nails 8 will fix the stainless steel bars 7.
[0025] The dam foundation drainage structure of the bank slope dam section in this application can be constructed according to the following steps: S1 and bank slope 2 are excavated to the designed slope ratio and the slope surface is cleaned. If there are faults, cracks, or weak interlayers, they must be treated according to the design requirements; S2. Drill the drainage channel 1 according to the design requirements. The drilling should be tilted 10° upwards. The hole position should be marked. The hole position deviation should not exceed 10cm, the hole inclination deviation should not exceed 1%, and the hole depth error should not exceed 2%. After drilling, the hole should be carefully flushed to prevent clogging. S3. Fabricate and install the water diversion steel pipe 4 according to the design requirements. The water diversion pipe 43 extends 20 cm into the drainage hole. Its opening is wrapped with geotextile and sealed with M10 cement mortar. A main water diversion pipe 41 is installed at the bottom of each bank slope 2 and connected to the branch pipes using reducing two-way or tee pipes. The main water diversion pipe 41 extends downstream beyond the concrete wall.
[0026] 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 bank slope dam foundation drainage structure, characterized in that: include: Drainage holes are provided in the bank slope, and the drainage holes gradually slope downward from the bank slope to the side of the dam body. There are multiple drainage holes, and the multiple drainage holes are arranged in a plum blossom shape on the bank slope; Multiple groups of water diversion steel pipes are arranged on the slope surface of the bank slope, and one group of water diversion steel pipes is correspondingly arranged on the slope surface of the first-level bank slope; one group of water diversion steel pipes includes a water diversion main pipe and multiple water diversion branch pipes, the length direction of the water diversion branch pipes extends along the height direction of the bank slope and connects multiple drainage channels on the same straight line, multiple water diversion branch pipes are arranged at intervals along the extension direction of the bank slope, the water diversion main pipe is located at the bottom of the first-level bank slope, and the water diversion main pipe connects multiple water diversion branch pipes.
2. The bank slope dam section foundation drainage structure according to claim 1, characterized in that: The water diversion steel pipe also includes a plurality of water diversion connecting pipes, which at least partially extend into the drainage channel and connect the orifice of the drainage channel and the water diversion branch pipe; the pipe mouth of the water diversion connecting pipe is wrapped with geotextile, and the gap between the outer peripheral wall of the water diversion connecting pipe and the drainage channel is sealed by M10 cement mortar.
3. The bank slope dam section foundation drainage structure according to claim 2, characterized in that: The water diversion branch pipe is connected to the water diversion main pipe through a reducing two-way pipe or a reducing three-way pipe. The water diversion main pipe is a DN200 galvanized steel pipe, and the water diversion branch pipe and / or the water diversion connecting pipe are DN80 galvanized steel pipes.
4. The bank slope dam section foundation drainage structure according to any one of claims 1 to 3, characterized in that: The drainage channel is inclined at an angle of 10° from the bank slope to the side of the dam body, and multiple drainage channels are arranged in a plum blossom shape with equal intervals; the water main pipe is coated with an asphalt layer on the pipe wall on both sides of the bank slope and / or the structural seam of the dam body, and the length of the asphalt layer is 1m.
5. The bank slope dam section foundation drainage structure according to claim 4, characterized in that: The water main pipe and the water branch pipe are fixed to the excavation surface of the slope respectively by stainless steel bars and nails. The stainless steel bars radially span the water main pipe or the water branch pipe and are close to the excavation surface. The nails will fix the stainless steel bars.