Water diversion aqueduct and slag blocking wall combined arrangement structure and construction method

Abstract

The invention provides a water diversion aqueduct and slag retaining wall combined arrangement structure and a construction method, a water diversion canal system is arranged under the topographic conditions of a high steep slope and a developed deep trench in a high seismic intensity area, an aqueduct is arranged in a building of the water diversion canal system to cross the deep trench, and a concrete slag retaining wall is arranged in the deep trench in combination with the aqueduct to reduce the height of the aqueduct. Pier columns of the aqueduct take slag blocking walls as foundations, the bottoms of the pier columns adopt an expanded section form, and vertical steel bars are arranged to penetrate into the concrete slag blocking walls. The inner side of the slag blocking wall is filled with waste slag of channel system construction, and a water intercepting and draining ditch is arranged around a slag stacking body and penetrates through the aqueduct. According to the aqueduct structure, the anti-seismic safety degree of the aqueduct structure can be improved, the engineering investment of the aqueduct is saved, the slag field can be arranged on the inner side of the slag stopping wall, and nearby slag discarding of canal system engineering is facilitated so that the transportation cost can be saved.

Description

Technical Field

[0001] The invention relates to the field of water conservancy and hydropower engineering, and in particular to a structure and a construction method of a water diversion aqueduct combined with a slag retaining wall arrangement, which is particularly suitable for small and medium-sized water supply and irrigation projects built in mountainous areas. Background Art

[0002] Water supply and irrigation projects built in mountainous areas have complex topographic and geological conditions. Water supply and irrigation canal projects generally need to adopt different structural types such as channels, pipes, and aqueducts according to the topographic and geological conditions. Aqueducts are often used as cross-ditch structures for water diversion projects in gully-alternating sloping terrain. When the gullies are deep, the height of the aqueduct piers is very large. In order to ensure the seismic safety of the structure, the size of the piers and the amount of reinforcement need to be increased. For some small and medium-sized projects, the cost does not match the scale of the project. At the same time, it is often difficult to arrange the slag yard when constructing canal projects in gully-alternating sloping terrain areas. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a structure and construction method of a water diversion aqueduct combined with a slag retaining wall, aiming to solve the problem of arranging a water diversion aqueduct across deep ditches under terrain conditions of high and steep slopes with alternating gullies, thereby saving project investment and ensuring the safe operation of the project.

[0004] In order to solve the above technical problems, the present invention is implemented by the following technical solutions: A structure of a water diversion aqueduct combined with a slag retaining wall, characterized in that: a water diversion channel is arranged under terrain conditions of high and steep slopes and developed deep trenches, an aqueduct is set up in the water diversion channel system building to cross the deep trench, the aqueduct is combined with a slag retaining wall, waste slag from the construction of the water diversion channel is filled in the slag retaining wall to form a slag pile body, an internal drainage ditch is set up around the slag pile body, the piers of the aqueduct body use the slag retaining wall as a foundation, the bottom of the pier adopts an enlarged cross-section form and vertical steel bars are set deep into the concrete slag retaining wall, and horizontal hoop steel bars are provided outside the vertical steel bars of the pier.

[0005] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions at the same time, or use these further technical solutions in combination: The slag retaining wall is a concrete structure, built on the bedrock in the excavated deep trench, with anchor bars, large square drainage holes arranged at the lower part, small circular drainage holes arranged at the upper part, the large square drainage holes are filled with large stones, and the inner ends of the large square drainage holes and the small circular drainage holes are provided with geotextile-wrapped gravel filters.

[0006] The aqueduct is arranged near the upstream end of the deep ditch. The water diversion aqueduct spans a deeper gully, and a slag retaining wall is arranged below the aqueduct. The slag retaining wall is used as the foundation of the pier of the water diversion aqueduct, which greatly reduces the height of the pier.

[0007] A slag yard is arranged inside the slag retaining wall, and the slope of the slag yard above the top of the slag retaining wall is relatively gentle to meet the stability requirement.

[0008] The water diversion aqueduct consists of piers and a channel body, and both the piers and the channel body are reinforced concrete structures.

[0009] Furthermore: an intercepting drainage ditch is arranged around the slag yard, the drainage ditch passes under the aqueduct and discharges to the downstream of the slag retaining wall.

[0010] According to a second aspect of the present invention, the present invention provides a construction method for a water diversion aqueduct combined with a slag retaining wall, comprising the following steps: a. Implement intercepting drainage ditches on sloping terrain; b. Clean the deep trench in the foundation area of ​​the slag retaining wall and construct foundation anchor bars; c. Cast the slag retaining wall, arrange the large square drainage holes and small round drainage holes simultaneously, and preset the vertical reinforcement of the pier column at the top of the slag retaining wall; d. Construction channels, where the excavated waste is piled up on the inner side of the slag retaining wall to form a slag pile; e. Finally, the construction of the aqueduct piers and aqueduct body is carried out.

[0011] Due to the adoption of the technical solution of the present invention, the present invention innovatively combines the water diversion aqueduct with the slag retaining wall to solve the design problem of the cross-ditch water diversion aqueduct of small and medium-sized projects under the terrain conditions of high and steep slopes with gullies. The present invention can greatly reduce the height of the pier, save the engineering investment of the aqueduct, and improve the seismic safety of the aqueduct structure; and the slag yard is set on the inner side of the slag retaining wall, which is conducive to the nearby disposal of slag in the canal system project and saves transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a plan view schematic diagram of the present invention; Figure 2 It is a schematic longitudinal section diagram of the aqueduct and the slag retaining wall of the present invention. Figure 1 AA section view; Figure 3 is a schematic cross-sectional view of the aqueduct and the slag retaining wall of the present invention, Figure 1 BB cross-sectional view; Figure 4 It is a cross-sectional view of the arrangement of the connecting steel bars of the aqueduct and the slag retaining wall of the present invention.

[0013] Figure numerals: 1-slope; 2-deep ditch; 3-water diversion channel; 4-aqueduct body; 5-slag retaining wall; 6-slag pile body; 7-intercepting drainage ditch; 8-anchor reinforcement; 9-square large drainage hole; 10-circular small drainage hole; 11-aqueduct pier; 12-aqueduct railing; 13-vertical connecting steel bar; 14-horizontal hoop reinforcement. DETAILED DESCRIPTION

[0014] like Figure 1~Figure 4 As shown, this embodiment is a structure and construction method of a water diversion aqueduct combined with a slag retaining wall arrangement, which can not only improve the seismic safety of the aqueduct structure and save the engineering investment of the aqueduct, but also set up a slag yard on the inner side of the slag retaining wall, which is conducive to the canal system project to discard slag nearby to save transportation costs. The main features of this embodiment are: a water diversion channel 3 is arranged under the terrain conditions of a high and steep slope 1 and a developed deep ditch 2 in a high seismic intensity area, an aqueduct is arranged in the water diversion canal system building to cross the deep ditch 2, the aqueduct is combined with a slag retaining wall 5, the slag from the construction of the water diversion channel 3 is filled in the slag retaining wall to form a slag pile 6, and an internal intercepting drainage ditch 7 is arranged around the slag pile. The pier 11 of the aqueduct body 4 uses the slag retaining wall 5 as a foundation, and the bottom of the pier 11 adopts an enlarged section form, which can be enlarged step by step from top to bottom, and vertical steel bars 13 are arranged to penetrate into the concrete slag retaining wall 5, and the vertical steel bars 13 of the pier 11 are provided with horizontal hoop steel bars 14 outside.

[0015] The slag retaining wall 5 is a concrete structure, built on the bedrock in the excavated deep trench 2, and is provided with anchor bars 8. Large square drainage holes 9 are arranged at the lower part, and small circular drainage holes 10 are arranged at the upper part. The large square drainage holes 9 are filled with large stones 15, and the inner ends of the large square drainage holes 9 and the small circular drainage holes 10 are provided with geotextile-wrapped gravel filtration structures 16.

[0016] The drainage ditch 7 passes through the bottom of the aqueduct and drains to the downstream of the slag retaining wall.

[0017] The construction method of the water diversion aqueduct combined with the slag retaining wall arrangement comprises the following steps: a. Implement intercepting drainage ditch 7 on slope terrain 1; b. Clean the deep trench 2 in the foundation range of the slag retaining wall 5 and construct the foundation anchor reinforcement 8; c. Cast the slag retaining wall 5, arrange the large square drainage holes 9 and the small circular drainage holes 10 simultaneously, and pre-set the vertical reinforcement 13 of the pier column 6 at the top of the slag retaining wall; d. Construction channel 3, the excavated waste is piled inside the slag retaining wall 5 to form a slag pile 6, which does not need to be transported outside, saving costs; e. Finally, the construction of the aqueduct piers 6 and the aqueduct body 4 is carried out, and a handrail 12 is arranged on the top of the aqueduct body.

[0018] The above embodiment is only a preferred technical solution of the present invention. Those skilled in the art should understand that the technical solutions or parameters in the embodiments can be modified or replaced without departing from the principle and essence of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A structure of a water diversion aqueduct combined with a slag retaining wall, characterized in that: A water diversion channel (3) is arranged under the terrain conditions of a high and steep slope (1) and a deep ditch (2). In order to cross the deep ditch (2), an aqueduct (4) is arranged in the water diversion channel system building. The aqueduct is combined with a slag retaining wall (5). The slag from the construction of the water diversion channel (3) is filled in the slag retaining wall (5) to form a slag pile (6). An internal intercepting drainage ditch (7) is arranged around the slag pile. The pier (11) of the aqueduct body (4) uses the slag retaining wall (5) as a foundation. The bottom of the pier (11) adopts an enlarged cross-section form and is provided with vertical steel bars (13) extending deep into the concrete slag retaining wall (5). Horizontal hoop steel bars (14) are arranged outside the vertical steel bars (13) of the pier (11).

2. The structure of a water diversion channel combined with a slag retaining wall according to claim 1, characterized in that: The slag retaining wall (5) is a concrete structure, built on the bedrock in the excavated deep trench (2), and is provided with anchor bars (8). A large square drainage hole (9) is arranged at the lower part, and a small circular drainage hole (10) is arranged at the upper part. The interior of the large square drainage hole (9) is filled with large stones, and the inner ends of the large square drainage hole (9) and the small circular drainage hole (10) are both provided with geotextile-wrapped gravel anti-filters.

3. The structure of a water diversion channel combined with a slag retaining wall according to claim 1, characterized in that: The aqueduct is arranged at a position close to the upstream end of the deep ditch and where the ditch depth is relatively small.

4. A construction method for the water diversion aqueduct combined with the slag retaining wall arrangement according to claim 1, characterized in that The following steps are involved: a. Implement intercepting drainage ditches on sloping terrain; b. Clean the deep trench in the foundation area of ​​the slag retaining wall and construct foundation anchor bars; c. Cast the slag retaining wall, arrange the large square drainage holes and small round drainage holes simultaneously, and preset the vertical reinforcement of the pier column at the top of the slag retaining wall; d. Construction channels, where the excavated waste is piled up on the inner side of the slag retaining wall to form a slag pile; e. Finally, the construction of the aqueduct piers and aqueduct body is carried out.

Images