Soft foundation spillway discharge chute bottom plate transverse seam lap joint structure
By adopting step-type tooth wall overlap structure and polyurethane clay caulking on the soft foundation, the sliding and floating problems of the bottom plate of the soft foundation spillway drainage channel are solved, and the stability and floating resistance of the bottom plate are enhanced, and structural instability caused by water seepage is prevented.
Patent Information
- Application Number
- CN202422281825.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The bottom plate of the spillway drainage trough built on a soft foundation is prone to slip unstable due to water seepage, and even fall off under water pressure, resulting in a domino effect. The prior art is difficult to effectively enhance its anti-slip and floating ability.
The step-type tooth wall overlap structure is adopted. The upper end of the lower drain bottom plate is made into a convex step upstream, and the lower end of the upper drain bottom plate is made into a concave step downstream. It is overlapped by the concave and convex tooth wall, combined with polyurethane clay caulking and polyethylene closed-cell foam board filling to enhance the stability of the bottom plate connection.
It improves the overall stability of the drain groove bottom plate, enhances the anti-slip and anti-floating ability, prevents the bottom plate from sliding and falling off, and avoids structural instability caused by water infiltration.
Smart Images
Figure CN223119018U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of water conservancy projects, and in particular relates to a structure for overlapping transverse seams of a spillway bottom plate on a soft foundation. Background Art
[0002] Spillway is a common water discharge structure, which is used as a channel for reservoir to discharge flood water, prevent flood water from overflowing the dam top and ensure the safety of dam buildings.
[0003] For earth-rock dam projects, the dam body is generally not allowed to discharge water. The spillway is usually arranged on the bank outside the dam body. The spillway foundation is mostly located on the bedrock and bonded to the bedrock through concrete. Sometimes, in order to ensure that the spillway is more closely combined with the bedrock, anchor bars are used to connect the two together. For some sections of the spillway foundation that do not meet the requirements of being located on the bedrock, local excavation is carried out to the bedrock and then backfilled with concrete to ensure that the foundation is located on a hard foundation.
[0004] However, in actual projects, some spillways are arranged on soft foundations or soil foundations. For example, the residual slope deposits on the mountain are thick, the bedrock is buried deep, and the excavation to the bedrock is large and uneconomical. Another example is the spillway project of the reservoir built on the Loess Plateau. The foundation of this type of spillway is inevitably located on a soft foundation. The soft foundation has a large foundation settlement. It is not like the bedrock and the foundation can be bonded into a whole, and anchor bars cannot be used for connection. Therefore, when the chute joints are not properly handled, after the seepage water enters the chute bottom plate, the bottom plate will slide and become unstable under the action of water pressure, and even the local section of the bottom plate will be lifted and fallen off under the superimposed dynamic water pressure condition, triggering a domino damage effect. Utility Model Content
[0005] The utility model aims to provide a lap joint structure of the transverse seam of the bottom plate of the spillway on soft foundation, which increases the overall stability of the bottom plate of the spillway and enhances the anti-slip and anti-floating capabilities of the bottom plate of the spillway.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] A structure for overlapping transverse seams of a spillway chute bottom plate on a soft foundation comprises a chute bottom plate, the chute bottom plate is arranged on a soft foundation, chute side walls are arranged on the vertical sides of the chute bottom plate, the transverse seams of the chute side walls are connected with the transverse seams of the chute bottom plate, the chute bottom plate is divided into an upper chute bottom plate and a lower chute bottom plate by the transverse seams, and the upper chute bottom plate and the lower chute bottom plate are overlapped at the transverse seams by using stepped tooth walls.
[0008] Preferably, the upper end of the lower chute floor slab is made horizontal and has an upstream convex stepped tooth wall, and the lower end of the upper chute floor slab is made horizontal and has a downstream concave stepped tooth wall. Through the lap joint of the concave and convex tooth walls, the lower chute floor slab is embedded under the upper chute floor slab, and the two chute floor slabs are connected into a whole.
[0009] Preferably, the transverse joint spacing is 2.0 cm, the horizontal bottom width of the convex stepped tooth wall is 3 - 5 m, the horizontal bottom width of the concave stepped tooth wall 6 is 1.0 m, and the step height and width are 0.80 m to 1.20 m.
[0010] Preferably, a water stop is arranged in the transverse joint, the surface of the transverse joint is caulked with polyurethane caulking compound, the caulking depth is 2 - 5 cm, and the rest of the transverse joints are filled with polyethylene closed-cell foam board.
[0011] Preferably, the elevation of the top of the chute side wall is greater than the highest water level of the chute.
[0012] The beneficial effect of the utility model lies in: increasing the overall stability of the chute floor slab, and enhancing the anti-sliding and anti-floating capabilities of the chute floor slab. Description of the Drawings
[0013] Figure 1 It is a structural diagram of the lap joint of the soft foundation chute floor slab of the utility model.
[0014] Figure 2 It is a structural diagram of the joint water stop of the floor slab of the utility model.
[0015] Among them: 1. Upper chute floor slab; 2. Transverse joint; 3. Water stop; 4. Lower chute floor slab; 5. Convex stepped tooth wall; 6. Concave stepped tooth wall; 7. Chute side wall; 8. Concrete cushion; 9. Polyethylene closed-cell foam board; 10. Polyurethane caulking compound. Detailed Embodiment
[0016] To make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model.
[0017] As Figure 1 - Figure 2 shown, a structure of the transverse joint lap joint of the soft foundation spillway chute floor slab includes a chute floor slab, a chute side wall 7, and a concrete cushion 8.
[0018] The chute floor slab includes an upper chute floor slab 1, a lower chute floor slab 4, a transverse joint 2, a convex stepped tooth wall 5, and a concave stepped tooth wall 6.
[0019] The transverse joint 2 includes a water stop 3, a polyethylene closed-cell foam board 9, and a polyurethane caulking compound 10.
[0020] The chute floor slab is arranged on soft foundation. A 10-cm-thick low-strength concrete cushion 8 is cast on the contact surface between the chute floor slab and the soft foundation. The chute side wall 7 is arranged on the vertical side of the chute floor slab. The transverse joints 2 of the chute side wall 7 are communicated with the transverse joints 2 of the chute floor slab. The chute floor slab is divided into the upper chute floor slab 1 and the lower chute floor slab by the transverse joint 2. The upper chute floor slab 1 and the lower chute floor slab 4 adopt a stepped toothed wall lap joint at the transverse joint 2.
[0021] The upper end of the lower chute floor slab 4 is made into a horizontal and upstream convex stepped toothed wall 5, and the lower end of the upper chute floor slab 1 is made into a horizontal and downstream concave stepped toothed wall 6. Through the lap joint of the convex and concave toothed walls, the lower chute floor slab 4 is embedded under the upper chute floor slab 1, and the two chute floor slabs are connected into a whole, increasing the overall stability and enhancing the anti-sliding and anti-floating capabilities of the floor slab.
[0022] The thickness of the chute floor slab on soft foundation is generally larger than that on rock foundation, usually 0.5 m to 1.0 m. The transverse joint 2 is excavated into a stepped shape with sufficient width to meet the lap joint of the upstream and downstream chute convex and concave toothed walls. The spacing of the transverse joints 2 is 2.0 cm. The horizontal bottom width of the downstream convex stepped toothed wall 5 is determined according to the chute slope and structural stability, generally taking 3 - 5 m. The horizontal bottom width of the upstream concave stepped toothed wall 6 generally takes 1.0 m. The step height and width take 0.80 m to 1.20 m.
[0023] To prevent water flow from entering the foundation along the transverse joint 2, a water stop 3 is arranged in the transverse joint 2. The material of the water stop 3 mostly selects a rubber water stop belt. The installation position is 15 cm away from the chute surface. The surface of the transverse joint 2 is caulked with polyurethane caulking compound 10, and the caulking depth is 2 - 5 cm. The rest of the transverse joints 2 are filled with polyethylene closed-cell foam board 9.
[0024] The top elevation of the chute side wall 7 should be greater than the highest water level of the chute, and at the same time, a safety heightening of 0.5 - 1.5 m is considered based on the highest water level.
Claims
1. A structure for transverse joint lapping of the chute floor of a soft foundation spillway, characterized in that, It includes a chute floor slab, the chute floor slab is arranged on soft foundation, chute side walls are arranged on the vertical sides of the chute floor slab, transverse joints of the chute side walls penetrate through transverse joints of the chute floor slab, the chute floor slab is divided into an upper chute floor slab and a lower chute floor slab by the transverse joints, and the upper chute floor slab and the lower chute floor slab are lap-jointed by a stepped toothing wall at the transverse joints.
2. The structure of the transverse joint lap of the chute floor of the soft foundation spillway according to claim 1, characterized in that, The upper end of the lower chute floor slab is made into a horizontal and upstream convex stepped toothing wall, the lower end of the upper chute floor slab is made into a horizontal and downstream concave stepped toothing wall, and by lap-jointing the convex and concave toothing walls, the lower chute floor slab is embedded under the upper chute floor slab, and the two chute floor slabs are connected into a whole.
3. The structure of the transverse joint overlap of the chute floor of the soft foundation spillway according to claim 1, characterized in that, The spacing of the transverse joints is 2.0 cm, the horizontal bottom width of the convex stepped toothing wall is taken as 3 - 5 m, the horizontal bottom width of the concave stepped toothing wall is taken as 1.0 m, and the step height and width are taken as 0.80 m - 1.20 m.
4. The structure of the transverse joint lapping of the chute floor of the soft foundation spillway according to claim 1, characterized in that, Water stops are arranged in the transverse joints, polyurethane caulking compound is used for caulking the surfaces of the transverse joints, the caulking depth is 2 - 5 cm, and polyethylene closed-cell foam boards are filled between the other transverse joints.
5. The structure of the transverse joint lapping of the chute floor of the soft foundation spillway according to claim 1, wherein, The elevation of the top of the chute side wall is greater than the highest water level of the chute.