Non-overflow dam section structure of wide river channel and low water head
By optimizing the structure of the cantilever non-overflow dam section, the problems of high engineering volume and waste disposal of gravity dams in wide river channels were solved, achieving the effects of reducing engineering costs and protecting the environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-24
AI Technical Summary
In wide river channels, the non-overflow section of traditional gravity dams involves a large amount of concrete work, and the dumping of waste leads to serious problems in land acquisition, water conservation, and environmental protection, making investment control difficult.
The cantilever non-overflow dam section structure is adopted, including the front toe, bottom slab, vertical arm, vertical wall and dry-laid stone slope protection. Combined with the backfill area behind the wall, the structural form is optimized to reduce the amount of engineering work and waste disposal.
To reduce engineering costs, improve construction efficiency, enhance structural stability, solve environmental problems caused by waste disposal, and achieve economical and environmentally friendly engineering design.
Smart Images
Figure CN224031606U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to hydraulic structure, and especially relates to a non overflow dam section structure of wide river channel low water head. BACKGROUND
[0002] With the continuous improvement of engineering design technical level in recent years, the water conservancy and hydropower engineering design also follows the development trend, and the application of new technologies makes the design of hydraulic structures more ingenious and advanced. Generally, the non overflow dam section of the gate dam arranged on the wide river channel usually adopts the gravity dam type, and the gravity dam type is usually arranged on the non overflow dam section at the position with low water head and wide river channel, and the concrete engineering quantity is large, and the investment budget of the general small and medium-sized water conservancy and hydropower engineering is limited, so that the control of the engineering quantity and the engineering investment report proportion is relatively strict. Meanwhile, the riverbed is excavated and the gravel and soil are abandoned, and the abandoned material needs to be stacked in the abandoned slag field, and problems such as land acquisition, water conservation, environmental protection and flood control are caused in the process of stacking the abandoned slag. CONTENT OF THE UTILITY MODEL
[0003] In view of the problems in the prior art, the utility model provides a non overflow dam section structure of wide river channel low water head, adopts a relatively light and thin cantilever type water retaining structure, and optimizes and innovates the structure form of the traditional non overflow dam section. The engineering quantity is saved through the optimization of the body type, the engineering cost is reduced, and the problems such as land acquisition difficulty, water conservation and environmental protection caused by the stacking of a large amount of abandoned slag are effectively alleviated. The non overflow dam section structure is more economical, environmentally friendly and sustainable.
[0004] The utility model is implemented as follows: a non overflow dam section structure of wide river channel low water head adopts a cantilever type non overflow dam section, and comprises a fore toe, a bottom plate, a vertical arm, a vertical wall, a back wall backfill area and dry masonry slope protection, the fore toe is located at the front end of the bottom plate, a slope surface is arranged on the top surface of the bottom plate, the vertical arm is arranged at the junction of the fore toe and the bottom plate, the water-facing surface of the vertical arm is a vertical surface perpendicular to the horizontal plane, the backwater surface of the vertical arm is provided with a slope surface, and the slope surface intersects with the slope surface of the top surface of the bottom plate, the vertical wall is arranged at the top of the vertical arm, the backwater side of the vertical wall intersects with the backwater slope of the vertical arm perpendicularly, the backwater side of the vertical arm and the backwater side of the vertical wall are backfilled to form the back wall backfill area, and the backwater side of the back wall backfill area is provided with a slope surface and the slope surface is provided with the dry masonry slope protection.
[0005] When the slope foot of the back wall backfill area is limited in arrangement, an earth retaining wall is arranged at the position of the slope foot.
[0006] The back wall backfill area is backfilled with excavated materials.
[0007] The width of the fore toe is 1.0-2.5 m, and the height is 1 / 4 of the total height of the non overflow dam section.
[0008] The slope of the top surface of the bottom plate is 1:4, and the total width of the bottom plate and the fore toe is not less than 3 / 4 of the total height of the non overflow dam section.
[0009] The backwater slope of the vertical arm is 1:(0.3-0.5).
[0010] The vertical wall is not less than 0.6m in width and not more than 1.2m in height.
[0011] The backfill area behind the wall is filled with soil to the same height as the top of the vertical wall, and the top width of the filled soil is 6.0m, and the slope is 1:(1.5-2.25).
[0012] The thickness of the dry masonry stone slope is 0.3-0.5m.
[0013] The utility model has the advantages and technical effects that compared with the traditional gravity dam structure applied in the non-overflow dam section of the river lock, the utility model shows significant advantages in effectively reducing the amount of concrete and solving the problem of abandoned slag stacking; the utility model reduces the material cost through the optimization of the vertical arm structure, improves the construction efficiency, increases the size of the bottom plate structure, significantly improves the anti-skid and anti-inclination stability, and thus ensures the safety and reliability of the structure. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is the schematic view of the non-overflow dam section structure of the wide river channel low water head of the utility model;
[0015] Figure 2 is the lock dam plane layout drawing of the non-overflow dam section structure of the wide river channel low water head adopting the utility model;
[0016] In the drawing, 1 is the front toe, 2 is the bottom plate, 3 is the vertical arm, 4 is the vertical wall, 5 is the backfill soil behind the wall, and 6 is the dry masonry stone slope. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0018] In the description of the utility model, it should be explained that the terms "upper", "middle", "lower", "inner", "outer", "two sides" and the like indicate the orientation or positional relationship shown in the drawing, and are only for the convenience of the simplified description of the utility model, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0019] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term '' install '' '' set '' '' connect '' and so on, should do broad sense understanding, for example '' connect '', can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.
[0020] As Figure 1 The utility model discloses a wide river channel low water head's non overflow dam section structure adopts cantilever non overflow dam section, including toe 1, bottom plate 2, vertical arm 3, vertical wall 4, wall backfill area 5 and dry masonry revetment 6, toe 1 is located at the front end of bottom plate 2, and the top surface of bottom plate 2 is provided with a slope surface, and the top surface of the junction of toe 1 and bottom plate 2 is arranged vertical arm 3, and the water-facing surface of vertical arm 3 is vertical surface perpendicular to horizontal plane, and the backwater surface of vertical arm is provided with slope surface and the slope surface intersects with the slope surface of the top surface of bottom plate, and the top of vertical arm 3 is provided with vertical wall 4, and the backwater side of vertical wall 4 is vertical and intersects with the backwater slope of vertical arm 3, and the backwater side of vertical arm 3 and the backwater side of vertical wall 4 are backfilled to form wall backfill area 5, and the backwater side of wall backfill area 5 adopts slope surface and the slope surface adopts dry masonry revetment 6.
[0021] When the slope foot of the wall backfill area 5 is arranged limitedly, a retaining wall is added at the position of the slope foot.
[0022] The wall backfill area 5 is backfilled with excavated material.
[0023] Preferably, the width of the toe 1 is 1.0-2.5 m, and the height is 1 / 4 of the total height of the non overflow dam section.
[0024] Preferably, the slope of the top surface of the bottom plate 2 is 1:4, and the total width of the bottom plate and the toe is not less than 3 / 4 of the total height of the non overflow dam section.
[0025] Preferably, the slope of the backwater surface of the vertical arm is 1:0.3-0.5.
[0026] Preferably, the width of the vertical wall 4 is not less than 0.6 m, and the height is not more than 1.2 m.
[0027] Preferably, the filling height of the wall backfill area 5 is flush with the top of the vertical wall 4, the top width of the filling is 6.0 m, and the slope is 1:1.5-2.25.
[0028] Preferably, the thickness of the dry masonry revetment 6 is 0.3-0.5 m.
[0029] As Figure 2As shown, the gate dam arrangement is arranged in a river bed with large river width and low water retaining condition, and the overall arrangement content is composed of non overflow dam section, gate chamber section, gate house dam section, guide wall and stilling basin. The non overflow dam section is arranged on both sides of the gate chamber, wherein the bottom structure is divided by the upstream vertical surface of the vertical arm 3, the front end of the bottom structure is the front toe 1, the rear part is the bottom plate 2, and the vertical wall 4 is arranged on the top of the vertical arm. The backfill area 5 slope surface on the back of the wall is filled with dry masonry slope protection 6.
[0030] In the embodiment, the width of the front toe 1 is 2.0 m, and the height is 1 / 4 of the total height of the non overflow dam section. The slope of the top surface of the bottom plate 2 is 1:4, and the total width of the floor and the front toe is 3 / 4 of the total height of the non overflow dam section. The slope of the backwater surface of the vertical arm 3 is 1:0.3. The vertical wall 4 with a width of 0.6 m and a height of 1.0 m is arranged on the top of the vertical arm. The height of the backfill area 5 behind the wall is flush with the top of the wall, the top width of the fill is 6.0 m, and the slope is 1:2. The thickness of the dry masonry slope protection 6 is 0.40 m.
[0031] The utility model adopts the cantilever type concrete structure and the advantages of earth and rockfill dam, compared with the traditional gravity dam which solves the stability problem by using its own gravity, the utility model skillfully utilizes the stress characteristics of the structure to make the concrete structure more light and thin; combined with the backfill behind the wall, the stability and stress failure problem when the water level is high during operation is solved, and the problems of excavation and waste dumping are also solved; in the engineering application, the engineering material cost is greatly reduced, and the construction period is correspondingly shortened; the use of the front toe not only reduces the wall stress during construction, but also generally combines with curtain grouting arrangement, and uses the front toe as grouting weight; the excavation material is backfilled behind the non overflow dam section, and the problems of large excavation amount, much waste, wide land occupation area and the like caused by arrangement type or topographic and geological conditions are solved.
[0032] The utility model structure is used in general river gate, channel, landscape creation and other small and medium-sized water conservancy projects, especially for low water head application, and the general structure total height is not more than 16.0 m, and the water head application range is generally not more than 15.0 m. In the construction process, the structure stress type under different working conditions should be fully considered to ensure that the structure damage is avoided.
[0033] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A non-overflow dam section structure for wide river channel and low water head, characterized by, The cantilever non-overflow dam section comprises a front toe (1), a bottom plate (2), a vertical arm (3), a vertical wall (4), a backfill area (5) behind the wall and dry masonry slope protection (6). The front toe (1) is located at the front end of the bottom plate (2). A slope surface is arranged on the top surface of the bottom plate (2). The vertical arm (3) is arranged on the top surface of the junction between the front toe (1) and the bottom plate (2). The water-facing surface of the vertical arm (3) is a vertical surface perpendicular to the horizontal surface. The backwater surface of the vertical arm is provided with a slope surface which intersects with the slope surface of the top surface of the bottom plate. The vertical wall (4) is arranged on the top of the vertical arm (3). The backwater side of the vertical wall (4) intersects with the backwater slope of the vertical arm (3). The backwater side of the vertical arm (3) and the backwater side of the vertical wall (4) are backfilled to form the backfill area (5) behind the wall. The backwater side of the backfill area (5) is provided with a slope surface which is protected by the dry masonry slope protection (6).
2. The low head non-overflow dam section of claim 1, wherein, When the slope foot of the backfill area (5) behind the wall is limited in arrangement, a retaining wall is arranged at the position of the slope foot.
3. The low head non-overflow dam section of claim 1, wherein, The backfill area (5) behind the wall is backfilled with excavated materials.
4. The low head non-overflow dam section of claim 1, wherein, The width of the front toe (1) is 1.0-2.5 m and the height is 1 / 4 of the total height of the non-overflow dam section.
5. The low head non-overflow dam section of claim 1, wherein, The slope of the top surface of the bottom plate (2) is 1:
4. The total width of the bottom plate and the front toe is not less than 3 / 4 of the total height of the non-overflow dam section.
6. The low head non-overflow dam section of claim 1, wherein, The slope of the backwater surface of the vertical arm is 1:(0.3-0.5).
7. The low head non-overflow dam section of claim 1, wherein, The width of the vertical wall (4) is not less than 0.6 m and the height is not more than 1.2 m.
8. The low head non-overflow dam section of claim 1, wherein, The filling height of the backfill area (5) behind the wall is flush with the top of the vertical wall (4). The top width of the filling is 6.0 m and the slope is 1:(1.5-2.25).
9. The low head non-overflow dam section of claim 1, wherein, The thickness of the dry masonry slope protection (6) is 0.3-0.5 m.