Tail water pipe structure with non-rectangular section of diffusion section

Abstract

The draft tube structure with the non-rectangular section of the diffusion section comprises a draft tube, the tops and the bottoms of the two sides of the section of the draft tube are in transition through fillets, the arcs and the radiuses of the fillets are gradually reduced in the water flow direction, and the draft tube is sequentially composed of a bottom plate, side walls and a top plate from bottom to top. The side walls comprise a plurality of concrete walls poured according to the number of draft tube orifices, the top plate comprises a plurality of prefabricated inverted-T-shaped beams, the prefabricated inverted-T-shaped beams are erected on the draft tube orifices, the two sides of the bottoms of the prefabricated inverted-T-shaped beams are fixedly connected with the tops of the concrete walls, the tops of the prefabricated inverted-T-shaped beams are covered with concrete layers, and the concrete layers are connected with the concrete walls. According to the draft tube structure with the non-rectangular section of the diffusion section, the problems that a top plate of the diffusion section of an existing non-rectangular draft tube structure is large in construction difficulty and slow in construction progress are solved.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy and hydropower engineering technology, specifically relating to the tailrace pipe structure with a non-rectangular cross section in the diffusion section. Background Technology

[0002] The tailrace pipe is a fundamental structure of the hydroelectric powerhouse, significantly influencing its layout and structure. The tailrace pipe has a complex structure and strong overall integrity. Based on the structural characteristics of each part, it is divided into three sections: the cone section, the elbow section, and the diffuser section.

[0003] When the top slab of the tailrace diffuser section is thick, it needs to be poured in layers. The utility model patent: a tailrace structure of a hydropower station has been authorized, with the authorization announcement date being: 2014.09.03 and the authorization announcement number being: CN203808030U. When the tailrace diffuser section has a regular rectangular cross section, for the convenience of construction, the top slab concrete pouring of this patent uses precast beams as load-bearing formwork.

[0004] However, in actual engineering projects, in order to improve water flow conditions, the tailrace diffuser section is often an irregular (non-rectangular) structure with varied cross-sections and complex structure. For tailrace sections with irregular diffusers, precast beam structures with regular cross-sections are difficult to apply. Currently, the traditional cast-in-place concrete method is still used for construction. This method results in a high top slab, time-consuming erection of supporting formwork, high construction difficulty, and high project investment. Utility Model Content

[0005] The purpose of this invention is to provide a tailwater pipe structure with a non-rectangular cross-section for the diffuser section, which solves the problems of high construction difficulty and slow construction progress of the top plate of the non-rectangular diffuser section in existing tailwater pipe structures.

[0006] The technical solution adopted in this utility model is a tailwater pipe structure with a non-rectangular cross-section in the diffusion section, including a tailwater pipe. The top and bottom of both sides of the tailwater pipe are transitioned by rounded corners. The rounded corners and radii gradually decrease along the water flow direction. The tailwater pipe is composed of a bottom plate, side walls and a top plate from bottom to top. The side walls include several concrete walls cast according to the number of tailwater pipe orifices. The top plate includes several precast inverted T-beams. The precast inverted T-beams are all erected on the tailwater pipe orifices. The bottom sides of the precast inverted T-beams are fixed to the top of the concrete walls. The top of the precast inverted T-beams is covered with a concrete layer, and the concrete layer is connected to the concrete walls.

[0007] The features of this utility model also include:

[0008] The concrete walls on both sides of the edge are side piers, and the remaining concrete walls are middle piers. Both side piers are fixed to the precast inverted T-shaped beams with infill structures, which are rounded corner structures of tailwater pipes.

[0009] Both side piers have grooves on their tops near the infill structure. Several reinforcing bars are pre-embedded in the grooves. One end of the reinforcing bar is embedded inside the side pier, and the other end is inserted into the infill structure.

[0010] The bottom of the precast inverted T-shaped beams at the top of the two side piers is provided with grooves near the infill structure. Several reinforcing bars are pre-embedded in the grooves. One end of the reinforcing bars is embedded in the precast inverted T-shaped beam, and the other end of the reinforcing bars is inserted into the infill structure.

[0011] The bottom of the grooves on the two side piers is slightly lower than the bottom of the rounded corners on both sides of the tailpipe.

[0012] The contact length between the infill structure and the side pier is equal to the contact length between the infill structure and the precast inverted T-beam.

[0013] Steel plates are embedded on both sides of the bottom of the precast inverted T-beams, and angle steel is embedded on the top of the concrete walls. The steel plates are welded and fixed to the top of the angle steel.

[0014] The inner surface of the steel plate is welded with tie rods extending into the precast inverted T-beam, and the inner surface of the angle steel is welded with tie rods extending into the concrete wall.

[0015] Precast inverted T-shaped beams are arranged at equal intervals along the direction of water flow.

[0016] The base slab and the concrete wall are cast as a single unit.

[0017] The beneficial effects of this utility model are:

[0018] The non-rectangular cross-section tailrace pipe structure provided by this utility model uses precast inverted T-shaped beams with variable cross-sections made of reinforced concrete as the top slab structure on both sides, which also serve as supporting formwork. This eliminates the need for additional supports, solving the problems of high construction difficulty and slow construction progress of the top slab of the diffuser section in existing non-rectangular tailrace pipe structures. It greatly improves construction efficiency, shortens the construction period, saves project investment, and has significant economic benefits. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the tailwater pipe structure with a non-rectangular cross-section in the diffusion section of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the orifice of this utility model;

[0021] Figure 3 for Figure 2 Detailed structural diagram;

[0022] Figure 4 for Figure 3 Schematic diagram of the side pier structure;

[0023] Figure 5 for Figure 4Enlarged structural diagram at point A in the middle;

[0024] Figure 6 for Figure 2 , Figure 3 and Figure 4 Schematic diagram of the cross-sectional structure of the precast inverted T-beam in the middle direction;

[0025] Figure 7 for Figure 2 , Figure 3 and Figure 4 Schematic diagram of the cross-sectional structure of the precast inverted T-beam in the middle section;

[0026] Figure 8 This is a side cross-sectional view of the present invention.

[0027] As shown in the figure: 1. Tailwater pipe; 2. Bottom slab; 3. Side wall; 31. Concrete wall; 311. Angle steel; 312. Side pier; 313. Middle pier; 32. Infill structure; 4. Top slab; 41. Precast inverted T-beam; 411. Steel plate; 42. Concrete layer. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] The tailrace pipe structure with a non-rectangular cross-section for the diffuser section provided by this utility model, such as Figure 1 As shown, the tailrace pipe 1 has rounded corners at the top and bottom of both sides of its cross-section. The radius and arc of the rounded corners gradually decrease along the direction of water flow. Figure 2 As shown, the tailwater pipe 1 is composed of a bottom plate 2, side walls 3, and a top plate 4 from bottom to top. The side walls 3 include several concrete walls 31 cast according to the number of orifices of the tailwater pipe 1, such as... Figure 3 As shown, the top plate 4 includes several precast inverted T-beams 41, which are all erected on the opening of the tailwater pipe 1. The bottom sides of the precast inverted T-beams 41 are fixed to the top of the concrete wall 31. The top of the precast inverted T-beams 41 is covered with a concrete layer 42, which is connected to the concrete wall 31.

[0030] The two side concrete walls 31 are edge piers 312, and the remaining concrete walls 31 are middle piers 313. Both edge piers 312 are fixedly connected to the precast inverted T-beams 41 by infill structures 32. The infill material of the infill structures 32 is concrete, and the infill structures 32 are rounded corner structures of the tailrace pipe 1. Figure 4 As shown, grooves are provided on the top of both side piers 312 near the infill structure 32. Several reinforcing bars are pre-embedded in the groove surfaces. One end of the reinforcing bar is embedded inside the side pier 312, and the other end is inserted into the infill structure 32. Figure 6 and Figure 7As shown, the bottom of the precast inverted T-shaped beams 41 at the top of the two side piers 312 is provided with grooves near the infill structure 32. Several reinforcing bars are pre-embedded in the grooves. One end of the reinforcing bar is embedded in the precast inverted T-shaped beam 41, and the other end of the reinforcing bar is inserted into the infill structure 32.

[0031] The bottom of the grooves of the two side piers 312 is slightly lower than the bottom of the rounded corners on both sides of the tailwater pipe 1, and the length of the groove of the inverted T-shaped beam 41 is slightly longer than the length of the filling structure 32.

[0032] The contact length between the infill structure 32 and the side pier 312 is equal to the contact length between the infill structure 32 and the precast inverted T-beam 41.

[0033] like Figure 5 As shown, steel plates 411 are embedded on both sides of the bottom of the precast inverted T-beam 41, and angle steel 311 is embedded on the top of the concrete wall 31. The steel plates and the top of the angle steel 311 are welded and fixed. Tie bars extending into the interior of the precast inverted T-beam 41 are welded to the inner surface of the steel plate 411, and tie bars extending into the interior of the concrete wall 31 are welded to the inner surface of the angle steel 311.

[0034] like Figure 8 As shown, the precast inverted T-shaped beams 41 are arranged at equal intervals along the direction of water flow.

[0035] The base plate 2 and the concrete wall 31 are cast together as a single unit.

[0036] The working principle of the tailwater pipe structure with a non-rectangular cross section of the diffusion section provided by this utility model is as follows: During construction, the bottom plate 2 of the tailwater pipe 1 and the concrete wall 31 are first poured. A precast inverted T-beam 41 is installed along the top surface of the concrete wall 31. The angle steel 311 at the top of the concrete wall 31 is welded and fixed to the steel plate 411 at the bottom of the precast inverted T-beam 41. A filling structure 32 is poured between the side pier 312 and the precast inverted T-beam 41. The precast inverted T-beam 41 is used as a support. The concrete layer 42 is poured to complete the construction of the tailwater pipe structure with a non-rectangular cross section of the diffusion section.

[0037] Example 1

[0038] The tailrace pipe structure with a non-rectangular cross-section for the diffuser section proposed in this embodiment is as follows: Figure 1 As shown, the tailrace pipe 1 has rounded corners at the top and bottom of both sides of its cross-section. The radius and arc of the rounded corners gradually decrease along the direction of water flow. Figure 2 As shown, the tailwater pipe 1 is composed of a bottom plate 2, side walls 3, and a top plate 4 from bottom to top. The side walls 3 include several concrete walls 31 cast according to the number of orifices of the tailwater pipe 1, such as... Figure 3As shown, the top plate 4 includes several precast inverted T-beams 41, which are all erected on the opening of the tailwater pipe 1. The bottom sides of the precast inverted T-beams 41 are fixed to the top of the concrete wall 31. The top of the precast inverted T-beams 41 is covered with a concrete layer 42, which is connected to the concrete wall 31.

[0039] Example 2

[0040] The tailrace pipe structure with a non-rectangular cross-section for the diffuser section proposed in this embodiment is as follows: Figure 1 As shown, the tailrace pipe 1 has rounded corners at the top and bottom of both sides of its cross-section. The radius and arc of the rounded corners gradually decrease along the direction of water flow. Figure 2 As shown, the tailwater pipe 1 is composed of a bottom plate 2, side walls 3, and a top plate 4 from bottom to top. The side walls 3 include several concrete walls 31 cast according to the number of orifices of the tailwater pipe 1, such as... Figure 3 As shown, the top plate 4 includes several precast inverted T-beams 41, which are all erected on the opening of the tailwater pipe 1. The bottom sides of the precast inverted T-beams 41 are fixed to the top of the concrete wall 31. The top of the precast inverted T-beams 41 is covered with a concrete layer 42, which is connected to the concrete wall 31.

[0041] The concrete walls 31 on both sides of the edge are side piers 312, and the remaining concrete walls 31 are middle piers 313. Both side piers 312 are fixedly connected to the precast inverted T-shaped beam 41 with infill structures 32. The infill material of the infill structure 32 is concrete, and the infill structure 32 is the rounded corner structure of the tailwater pipe 1.

[0042] Example 3

[0043] The tailrace pipe structure with a non-rectangular cross-section for the diffuser section proposed in this embodiment is as follows: Figure 1 As shown, the tailrace pipe 1 has rounded corners at the top and bottom of both sides of its cross-section. The radius and arc of the rounded corners gradually decrease along the direction of water flow. Figure 2 As shown, the tailwater pipe 1 is composed of a bottom plate 2, side walls 3, and a top plate 4 from bottom to top. The side walls 3 include several concrete walls 31 cast according to the number of orifices of the tailwater pipe 1, such as... Figure 3 As shown, the top plate 4 includes several precast inverted T-beams 41, which are all erected on the opening of the tailwater pipe 1. The bottom sides of the precast inverted T-beams 41 are fixed to the top of the concrete wall 31. The top of the precast inverted T-beams 41 is covered with a concrete layer 42, which is connected to the concrete wall 31.

[0044] The concrete walls 31 on both sides of the edge are side piers 312, and the remaining concrete walls 31 are middle piers 313. Both side piers 312 are fixedly connected to the precast inverted T-shaped beam 41 with infill structures 32. The infill material of the infill structure 32 is concrete, and the infill structure 32 is the rounded corner structure of the tailwater pipe 1.

[0045] like Figure 4 As shown, grooves are provided on the top of both side piers 312 near the infill structure 32. Several reinforcing bars are pre-embedded in the groove surfaces. One end of the reinforcing bar is embedded inside the side pier 312, and the other end is inserted into the infill structure 32. Figure 6 and Figure 7 As shown, the bottom of the precast inverted T-shaped beams 41 at the top of the two side piers 312 is provided with grooves near the infill structure 32. Several reinforcing bars are pre-embedded in the grooves. One end of the reinforcing bar is embedded in the precast inverted T-shaped beam 41, and the other end of the reinforcing bar is inserted into the infill structure 32.

[0046] Example 4

[0047] The tailrace pipe structure with a non-rectangular cross-section for the diffuser section proposed in this embodiment is as follows: Figure 1 As shown, the tailrace pipe 1 has rounded corners at the top and bottom of both sides of its cross-section. The radius and arc of the rounded corners gradually decrease along the direction of water flow. Figure 2 As shown, the tailwater pipe 1 is composed of a bottom plate 2, side walls 3, and a top plate 4 from bottom to top. The side walls 3 include several concrete walls 31 cast according to the number of orifices of the tailwater pipe 1, such as... Figure 3 As shown, the top plate 4 includes several precast inverted T-beams 41, which are all erected on the opening of the tailwater pipe 1. The bottom sides of the precast inverted T-beams 41 are fixed to the top of the concrete wall 31. The top of the precast inverted T-beams 41 is covered with a concrete layer 42, which is connected to the concrete wall 31.

[0048] The concrete walls 31 on both sides of the edge are side piers 312, and the remaining concrete walls 31 are middle piers 313. Both side piers 312 are fixedly connected to the precast inverted T-shaped beam 41 with infill structures 32. The infill material of the infill structure 32 is concrete, and the infill structure 32 is the rounded corner structure of the tailwater pipe 1.

[0049] like Figure 4 As shown, grooves are provided on the top of both side piers 312 near the infill structure 32. Several reinforcing bars are pre-embedded in the groove surfaces. One end of the reinforcing bar is embedded inside the side pier 312, and the other end is inserted into the infill structure 32. Figure 6 and Figure 7 As shown, the bottom of the precast inverted T-shaped beams 41 at the top of the two side piers 312 is provided with grooves near the infill structure 32. Several reinforcing bars are pre-embedded in the grooves. One end of the reinforcing bar is embedded in the precast inverted T-shaped beam 41, and the other end of the reinforcing bar is inserted into the infill structure 32.

[0050] The bottom of the grooves on the two side piers 312 is slightly lower than the bottom of the rounded corners on both sides of the tailpipe 1.

[0051] The contact length between the infill structure 32 and the side pier 312 is equal to the contact length between the infill structure 32 and the precast inverted T-beam 41.

[0052] Example 5

[0053] The tailrace pipe structure with a non-rectangular cross-section for the diffuser section proposed in this embodiment is as follows: Figure 1 As shown, the tailrace pipe 1 has rounded corners at the top and bottom of both sides of its cross-section. The radius and arc of the rounded corners gradually decrease along the direction of water flow. Figure 2 As shown, the tailwater pipe 1 is composed of a bottom plate 2, side walls 3, and a top plate 4 from bottom to top. The side walls 3 include several concrete walls 31 cast according to the number of orifices of the tailwater pipe 1, such as... Figure 3 As shown, the top plate 4 includes several precast inverted T-beams 41, which are all erected on the opening of the tailwater pipe 1. The bottom sides of the precast inverted T-beams 41 are fixed to the top of the concrete wall 31. The top of the precast inverted T-beams 41 is covered with a concrete layer 42, which is connected to the concrete wall 31.

[0054] The concrete walls 31 on both sides of the edge are side piers 312, and the remaining concrete walls 31 are middle piers 313. Both side piers 312 are fixedly connected to the precast inverted T-shaped beam 41 with infill structures 32. The infill material of the infill structure 32 is concrete, and the infill structure 32 is the rounded corner structure of the tailwater pipe 1.

[0055] like Figure 4 As shown, grooves are provided on the top of both side piers 312 near the infill structure 32. Several reinforcing bars are pre-embedded in the groove surfaces. One end of the reinforcing bar is embedded inside the side pier 312, and the other end is inserted into the infill structure 32. Figure 6 and Figure 7 As shown, the bottom of the precast inverted T-shaped beams 41 at the top of the two side piers 312 is provided with grooves near the infill structure 32. Several reinforcing bars are pre-embedded in the grooves. One end of the reinforcing bar is embedded in the precast inverted T-shaped beam 41, and the other end of the reinforcing bar is inserted into the infill structure 32.

[0056] The bottom of the grooves on the two side piers 312 is slightly lower than the bottom of the rounded corners on both sides of the tailpipe 1.

[0057] The contact length between the infill structure 32 and the side pier 312 is equal to the contact length between the infill structure 32 and the precast inverted T-beam 41.

[0058] like Figure 5 As shown, steel plates 411 are embedded on both sides of the bottom of the precast inverted T-beam 41, and angle steel 311 is embedded on the top of the concrete wall 31. The steel plates and the top of the angle steel 311 are welded and fixed. Tie bars extending into the interior of the precast inverted T-beam 41 are welded to the inner surface of the steel plate 411, and tie bars extending into the interior of the concrete wall 31 are welded to the inner surface of the angle steel 311.

[0059] Example 6

[0060] The tailrace pipe structure with a non-rectangular cross-section for the diffuser section proposed in this embodiment is as follows: Figure 1 As shown, the tailrace pipe 1 has rounded corners at the top and bottom of both sides of its cross-section. The radius and arc of the rounded corners gradually decrease along the direction of water flow. Figure 2 As shown, the tailwater pipe 1 is composed of a bottom plate 2, side walls 3, and a top plate 4 from bottom to top. The side walls 3 include several concrete walls 31 cast according to the number of orifices of the tailwater pipe 1, such as... Figure 3 As shown, the top plate 4 includes several precast inverted T-beams 41, which are all erected on the opening of the tailwater pipe 1. The bottom sides of the precast inverted T-beams 41 are fixed to the top of the concrete wall 31. The top of the precast inverted T-beams 41 is covered with a concrete layer 42, which is connected to the concrete wall 31.

[0061] The concrete walls 31 on both sides of the edge are side piers 312, and the remaining concrete walls 31 are middle piers 313. Both side piers 312 are fixedly connected to the precast inverted T-shaped beam 41 with infill structures 32. The infill material of the infill structure 32 is concrete, and the infill structure 32 is the rounded corner structure of the tailwater pipe 1.

[0062] like Figure 4 As shown, grooves are provided on the top of both side piers 312 near the infill structure 32. Several reinforcing bars are pre-embedded in the groove surfaces. One end of the reinforcing bar is embedded inside the side pier 312, and the other end is inserted into the infill structure 32. Figure 6 and Figure 7 As shown, the bottom of the precast inverted T-shaped beams 41 at the top of the two side piers 312 is provided with grooves near the infill structure 32. Several reinforcing bars are pre-embedded in the grooves. One end of the reinforcing bar is embedded in the precast inverted T-shaped beam 41, and the other end of the reinforcing bar is inserted into the infill structure 32.

[0063] The bottom of the grooves on the two side piers 312 is slightly lower than the bottom of the rounded corners on both sides of the tailpipe 1.

[0064] The contact length between the infill structure 32 and the side pier 312 is equal to the contact length between the infill structure 32 and the precast inverted T-beam 41.

[0065] like Figure 5 As shown, steel plates 411 are embedded on both sides of the bottom of the precast inverted T-beam 41, and angle steel 311 is embedded on the top of the concrete wall 31. The steel plates and the top of the angle steel 311 are welded and fixed. Tie bars extending into the interior of the precast inverted T-beam 41 are welded to the inner surface of the steel plate 411, and tie bars extending into the interior of the concrete wall 31 are welded to the inner surface of the angle steel 311.

[0066] like Figure 8 As shown, the precast inverted T-shaped beams 41 are arranged at equal intervals along the direction of water flow.

[0067] The base plate 2 and the concrete wall 31 are cast together as a single unit.

Claims

1. A tailrace pipe structure with a non-rectangular cross-section in the diffuser section, characterized in that, The system includes a tailwater pipe (1), the top and bottom of the tailwater pipe (1) are transitioned by rounded corners on both sides of the cross section, the rounded corners and the radius gradually decrease along the water flow direction, the tailwater pipe (1) is composed of a bottom plate (2), side walls (3) and a top plate (4) from bottom to top, the side walls (3) include several concrete walls (31) cast according to the number of openings of the tailwater pipe (1), the top plate (4) includes several precast inverted T-shaped beams (41), the precast inverted T-shaped beams (41) are all erected on the openings of the tailwater pipe (1), the bottom sides of the precast inverted T-shaped beams (41) are fixed to the top of the concrete walls (31), the top of the precast inverted T-shaped beams (41) is covered with a concrete layer (42), the concrete layer (42) is connected to the concrete walls (31).

2. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 1, characterized in that, The concrete walls (31) on both sides of the edge are side piers (312), and the remaining concrete walls (31) are middle piers (313). The two side piers (312) are fixedly connected to the precast inverted T-beam (41) by a filling structure (32), which is the rounded corner structure of the tailwater pipe (1).

3. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 2, characterized in that, The top of each of the two side piers (312) is provided with a groove near the filling structure (32). Several reinforcing bars are pre-embedded in the groove surface. One end of the reinforcing bar is buried inside the side pier (312), and the other end of the reinforcing bar is inserted into the filling structure (32).

4. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 3, characterized in that, The bottom of the precast inverted T-beam (41) at the top of the two side piers (312) is provided with a groove near the filling structure (32). Several reinforcing bars are pre-embedded on the surface of the groove. One end of the reinforcing bar is embedded in the precast inverted T-beam (41), and the other end of the reinforcing bar is inserted into the filling structure (32).

5. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 4, characterized in that, The bottom of the grooves of the two side piers (312) is slightly lower than the bottom of the rounded corners on both sides of the tailpipe (1).

6. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 5, characterized in that, The contact length between the filling structure (32) and the side pier (312) is equal to the contact length between the filling structure (32) and the precast inverted T-beam (41).

7. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 1, characterized in that, Steel plates (411) are pre-embedded on both sides of the bottom of the precast inverted T-beam (41), and angle steel (311) is pre-embedded on the top of the concrete wall (31). The steel plates are welded and fixed to the top of the angle steel (311).

8. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 7, characterized in that, The inner surface of the steel plate (411) is welded with a tie bar extending into the interior of the precast inverted T-beam (41), and the inner surface of the angle steel (311) is welded with a tie bar extending into the interior of the concrete wall (31).

9. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 1, characterized in that, The precast inverted T-shaped beams (41) are arranged at equal intervals along the direction of water flow.

10. The tailrace pipe structure with a non-rectangular cross-section in the diffuser section according to claim 1, characterized in that, The base plate (2) is integrally cast with the concrete wall (31).

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