A high-flow-rate stilling basin structure

Abstract

This invention discloses a large-flow stilling basin structure, relating to the field of hydraulic engineering technology, including sidewalls, a base plate, and a sealing assembly. The sidewalls are arranged around the base plate; backfill material is placed between the sidewalls and the bedrock; longitudinal and transverse drainage channels are provided at the bottom of the base plate; drainage filler is placed within the longitudinal and transverse drainage channels; at least one induced joint is provided on the upper surface of the base plate, and a sealing assembly is installed on the induced joint. A drainage strip is provided below the base plate to reduce the constraint of the bedrock on the base plate and enhance foundation drainage, reducing buoyancy. The induced joint on the base plate can reduce the size of the base plate, reducing cracks caused by temperature stress due to an excessively large base plate; a central diaphragm is provided on the base plate to increase the rigidity of the base plate and prevent cracks; the sealing assembly seals the top of the induced joint, preventing water in the stilling basin from flowing through the induced joint between the base plate and the bedrock, further reducing buoyancy.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and in particular to a large-flow stilling basin structure. Background Technology

[0002] High-head, large-discharge stilling basin structures are often very large due to high-speed water flow and anti-buoyancy issues. The thickness of the bottom plate is generally greater than 6-7m, and sometimes even thicker. In addition, due to the large discharge, in order to reduce the unit width flow, the width of the basin is often made larger, far exceeding the standard requirement of ≤20m width. Generally, it is made into a separate bottom plate.

[0003] Patent CN105239540A discloses an inclined-bottom plate type stilling basin, comprising a trough section, an inlet arc connecting section, an inclined bottom plate, a stilling basin tail sill, and a downstream apron; the trough section, the inlet arc connecting section, the inclined bottom plate, the stilling basin tail sill, and the downstream apron are sequentially connected to form the main body of the stilling basin. The trough section has a horizontal angle of θ relative to the horizontal plane, and the horizontal direction is a diffusion form with a diffusion angle of 0°.

[0004] Because of the high downstream water level, the stilling basin's bottom slab often fails to meet buoyancy requirements, necessitating numerous engineering measures such as foundation consolidation grouting, the installation of anchor piles under the bottom slab, and sometimes even anchor cables, to resolve the buoyancy issue. This involves many construction procedures, a large workload, and significant investment. Summary of the Invention

[0005] To address the above technical problems, this invention provides a large-flow stilling basin structure to solve the buoyancy problem of the stilling basin.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a large-flow stilling basin structure, including sidewalls, a base plate, and a sealing assembly; the sidewalls are disposed around the base plate; backfill material is disposed between the sidewalls and the bedrock; the bottom of the base plate is provided with longitudinal drainage channels and transverse drainage channels; drainage filler is disposed in the longitudinal drainage channels and the transverse drainage channels; at least one induced joint is provided on the upper surface of the base plate, and the sealing assembly is disposed on the induced joint.

[0008] Optionally, the drainage filler includes gravel.

[0009] Optionally, a drainage well or drainage ditch is provided on one side of the base plate, and the drainage well or drainage ditch is connected to the longitudinal drainage channel and the transverse drainage channel.

[0010] Optionally, a central partition block is provided on the upper surface of the middle part of the base plate.

[0011] Optionally, the sealing assembly includes a T-shaped steel plate, polyurea sealant, anchor bars, asphalt hemp, copper waterstop, and high-pressure closed-cell plate; the high-pressure closed-cell plate is disposed in the lower part of the induced joint, the two ends of the copper waterstop are embedded in the bottom plates on both sides of the induced joint, and the asphalt hemp is disposed in the copper lug in the middle of the copper waterstop; the vertical part of the T-shaped steel plate extends into the induced joint, the top of the anchor bar is connected to the horizontal part of the T-shaped steel plate, and the bottom of the anchor bar is embedded in the bottom plates on both sides of the induced joint; a polyurea sealant is disposed between the T-shaped steel plate and the induced joint.

[0012] Optionally, the thickness of the base plate is 3-4 meters.

[0013] Optionally, the width of the longitudinal drainage channel and the height of the transverse drainage channel are 40 cm and 40 cm respectively.

[0014] Optionally, the spacing between the longitudinal drainage channels is 4 meters, and the spacing between the transverse drainage channels is 4 meters.

[0015] Optionally, the width of the induced slit is 2 cm.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] The large-flow stilling basin structure of this invention mainly includes sidewalls, a bottom plate, and a sealing assembly. A drainage strip is installed below the bottom plate to reduce the constraint of the bedrock on the bottom plate and enhance foundation drainage, thereby reducing buoyancy. An induction joint is provided on the bottom plate to reduce its size and minimize cracks caused by temperature stress due to an excessively large bottom plate. A central diaphragm is installed on the bottom plate to increase its rigidity and prevent cracks. The sealing assembly seals the top of the induction joint, preventing water in the stilling basin from flowing through the induction joint between the bottom plate and the bedrock, further reducing buoyancy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the large-flow-rate stilling tank of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the large flow energy dissipation tank of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Side wall; 2. Base plate; 3. Central diaphragm; 4. Enclosure component; 5. Bedrock; 6. Longitudinal drainage channel; 7. Transverse drainage channel; 8. Backfill material; 9. T-shaped steel plate; 10. Induction joint. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 1 and 2 As shown, this embodiment provides a large-flow stilling basin structure, including a sidewall 1, a bottom plate 2, and a sealing component 4; the sidewall 1 is disposed around the bottom plate 2; backfill material 8 is disposed between the sidewall 1 and the bedrock 5; a longitudinal drainage channel 6 and a transverse drainage channel 7 are disposed at the bottom of the bottom plate 2; drainage filler is disposed in the longitudinal drainage channel 6 and the transverse drainage channel 7; at least one induction joint 15 is disposed on the upper surface of the bottom plate 2, and a sealing component 4 is disposed on the induction joint 15.

[0024] In this specific embodiment, the width of the base plate 2 is 35 meters, and a central partition 3 is provided on the upper surface of the middle part of the base plate 2. On both sides of the central partition 3, an induction joint 15 is provided in the middle part between the central partition 3 and the side wall 1, and a sealing component 4 is provided on each induction joint 15.

[0025] The sealing component 4 includes a T-shaped steel plate 9, a polyurea sealant 10, an anchor bar 11, asphalt hemp 12, a copper waterstop 13, and a high-pressure closed-hole plate 14. The high-pressure closed-hole plate 14 is installed in the lower part of the induced joint 15. The two ends of the copper waterstop 13 are embedded in the bottom plates 2 on both sides of the induced joint 15. Asphalt hemp 12 is installed in the copper nose in the middle of the copper waterstop 13. The vertical part of the T-shaped steel plate 9 extends into the induced joint 15. The top of the anchor bar 11 is connected to the horizontal part of the T-shaped steel plate 9. The bottom of the anchor bar 11 is embedded in the bottom plates 2 on both sides of the induced joint 15. A polyurea sealant 10 is installed between the T-shaped steel plate 9 and the induced joint 15.

[0026] In this specific embodiment, the drainage filler includes gravel (wrapped in geotextile). A drainage well is provided on one side of the base slab 2, and the drainage well is connected to the longitudinal drainage channel 6 and the transverse drainage channel 7. The gravel can provide a certain supporting force under the base slab 2, while reducing the constraint of the bedrock 5 on the base slab 2. The gaps between the gravel can enhance the foundation drainage, allowing groundwater between the base slab 2 and the bedrock 5 to flow quickly into the drainage well and be discharged, thereby reducing buoyancy.

[0027] In a more specific embodiment, the thickness of the base plate 2 is set to 3.5 meters. Compared with existing stilling basins, the thickness of the base plate 2 is significantly reduced, which can reduce construction steps, reduce the amount of work, and reduce investment.

[0028] In yet another, more specific embodiment, the longitudinal drainage channel 6 and the transverse drainage channel 7 are 40 cm wide and 40 cm high. The spacing between the longitudinal drainage channels 6 is 4 meters, and the spacing between the transverse drainage channels 7 is 4 meters.

[0029] The width of the induction joint 15 is 2 cm. When the stilling basin receives upstream drainage, the bottom plate 2 breaks along the induction joint 15, which can reduce the size of the bottom plate 2, reduce the cracks caused by temperature stress due to the large size of the bottom plate 2, and, together with the sealing component 4, prevent water in the stilling basin from flowing through the induction joint 15 between the bottom plate 2 and the bedrock 5, so as to further reduce the buoyancy force.

[0030] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A large-flow-rate stilling basin structure, characterized in that, The system includes sidewalls, a base plate, and a sealing assembly. The sidewalls are positioned around the base plate. Backfill material is provided between the sidewalls and the bedrock. The bottom of the base plate has longitudinal and transverse drainage channels. Drainage filler is provided within the longitudinal and transverse drainage channels. At least one induced joint is provided on the upper surface of the base plate. The sealing assembly is installed on the induced joint. The sealing assembly includes a T-shaped steel plate, polyurea sealant, anchor bars, asphalt hemp, copper waterstop, and a closed-cell plate. The closed-cell plate is located in the lower part of the induced joint. Both ends of the copper waterstop are embedded in the base plate on both sides of the induced joint. The asphalt hemp is provided in the copper lug in the middle of the copper waterstop. The vertical part of the T-shaped steel plate extends into the induced joint. The top of the anchor bar is connected to the transverse part of the T-shaped steel plate, and the bottom of the anchor bar is embedded in the base plate on both sides of the induced joint. A polyurea sealant is provided between the T-shaped steel plate and the induced joint.

2. The large-flow-rate stilling basin structure according to claim 1, characterized in that, The drainage filler includes gravel.

3. The large-flow-rate stilling basin structure according to claim 1, characterized in that, A drainage well or drainage ditch is provided on one side of the base plate, and the drainage well or drainage ditch is connected to the longitudinal drainage channel and the transverse drainage channel.

4. The large-flow-rate stilling basin structure according to claim 1, characterized in that, A central partition block is provided on the upper surface of the middle part of the base plate.

5. The large-flow-rate stilling basin structure according to claim 1, characterized in that, The thickness of the base plate is 3-4 meters.

6. The large-flow-rate stilling basin structure according to claim 1, characterized in that, The longitudinal drainage channel and the transverse drainage channel are 40 cm wide and 40 cm high.

7. The large-flow-rate stilling basin structure according to claim 1, characterized in that, The spacing between the longitudinal drainage channels is 4 meters, and the spacing between the transverse drainage channels is 4 meters.

8. The large-flow-rate stilling basin structure according to claim 1, characterized in that, The width of the induced suture is 2 centimeters.

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