A construction site layout structure under complex terrain conditions

Abstract

A construction site layout structure under complex terrain conditions includes an upstream cofferdam located upstream of a river channel within a reservoir. A drainage diversion structure is installed within the reservoir on one side of the river channel. One end of the drainage diversion structure connects to the river channel upstream of the upstream cofferdam, and the other end connects to the downstream section of the river channel. The section of the river channel between the downstream of the upstream cofferdam and the outlet of the drainage diversion structure dries up, forming the construction site and allowing for the construction of water-retaining structures. By utilizing the inundated river channel within the reservoir, and through upstream cofferdam water retention, drainage tunnels, open channels, and diversion tunnels, a localized dry riverbed environment is created within the reservoir. Excavated material is used to fill and level the construction site, creating site conditions suitable for temporary construction facilities during the construction period. This solves the problem of finding construction sites and spoil disposal areas outside the reservoir, reduces the land acquisition scope, and minimizes the impact on surrounding residents and the environment.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower engineering, and in particular to a construction site layout structure under complex terrain conditions. Background Technology

[0002] The construction of water conservancy and hydropower projects often requires a large amount of construction space to accommodate temporary facilities such as equipment storage yards, processing plants, and concrete mixing systems. At the same time, these projects also generate a significant amount of construction waste, necessitating the establishment of separate waste disposal sites. Construction sites are typically located on gently sloping terrain with convenient access or easy access roads, while waste disposal sites are usually situated in gullies far from residential areas.

[0003] Constructing water conservancy projects on rivers with complex terrain often presents challenges due to the scarcity of flat land around the project site and the narrowness of the river channels, leading to difficulties in locating construction sites and spoil disposal areas. This is especially true near towns or ecological protection red lines, where the constraints imposed by surrounding residents, farmland protection, and ecological conservation further exacerbate the problem. Therefore, finding suitable sites within a project construction area is particularly challenging when there are numerous residential areas, narrow river channels, and limited gentle slopes on both banks. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a construction site layout structure under complex terrain conditions that can reduce engineering waste and land acquisition scope and have less impact on the surrounding environment, so as to meet the requirements for the layout of temporary facilities for water conservancy and hydropower projects in areas without flat terrain and narrow river channels.

[0005] The technical solution of this utility model for a construction site layout structure under complex terrain conditions is as follows: there is a reservoir with a river channel within it, including an upstream cofferdam. The upstream cofferdam is located upstream of the river channel within the reservoir. A drainage diversion structure is installed in the reservoir on one side of the river channel. One end of the drainage diversion structure is connected to the river channel upstream of the upstream cofferdam, and the other end of the drainage diversion structure is connected to the downstream of the river channel. After the river channel section between the downstream of the upstream cofferdam and the outlet of the drainage diversion structure dries up, a construction site is formed and water-retaining structures are constructed.

[0006] Furthermore, the drainage diversion structure includes a drainage tunnel, a drainage channel, and a diversion tunnel. The drainage tunnel is located in a reservoir on one side of the construction site, the drainage channel is located in a river between the construction site and the water-retaining structure, and the diversion tunnel is located in a reservoir on one side of the water-retaining structure. The drainage tunnel is connected to the diversion tunnel via the drainage channel.

[0007] Furthermore, the drainage tunnel includes a drainage tunnel inlet, a drainage tunnel body, and a drainage tunnel outlet. The river channel on the upstream side of the upstream cofferdam is connected to the drainage tunnel inlet. The drainage tunnel inlet is connected to the drainage tunnel outlet via the drainage tunnel body. The drainage tunnel outlet is connected to the drainage open channel, and the drainage open channel is connected to the diversion tunnel.

[0008] Furthermore, the diversion tunnel includes a diversion tunnel inlet, a diversion tunnel body, and a diversion tunnel outlet. The drainage channel is connected to the diversion tunnel inlet, the diversion tunnel inlet is connected to the diversion tunnel outlet via the diversion tunnel body, and the diversion tunnel outlet is connected to the downstream of the river channel.

[0009] The beneficial effects of this utility model on the construction site layout structure under complex terrain conditions are as follows: by utilizing the submerged river channel within the reservoir, and through upstream cofferdams, drainage tunnels, open drainage channels, and diversion tunnels, a local dry environment is created within the reservoir. The construction site is then filled and leveled using excavated materials, forming site conditions that meet the requirements for temporary construction facilities during the construction period. This solution solves the problem of finding construction sites and spoil disposal sites outside the reservoir, reduces the land acquisition scope, and minimizes the impact on surrounding residents and the environment. Attached Figure Description

[0010] Figure 1 This is a plan view of a construction site layout structure under complex terrain conditions according to this utility model.

[0011] In the diagram, 1. Upstream cofferdam; 2. Drainage tunnel inlet; 3. Drainage tunnel body; 4. Drainage tunnel; 5. Drainage tunnel outlet; 6. Drainage channel; 7. Diversion tunnel inlet; 8. Diversion tunnel body; 9. Diversion tunnel; 10. Diversion tunnel outlet; 11. Water-retaining structure; 12. Construction site; 100. Reservoir; 101. River channel. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0013] This utility model relates to a construction site layout structure under complex terrain conditions, such as... Figure 1 As shown, there is a reservoir 100, and a river 101 within the reservoir 100, including an upstream cofferdam 1. The upstream cofferdam 1 is located upstream of the river 101 within the reservoir 100. A drainage diversion structure is installed in the reservoir 100 on one side of the river 101. One end of the drainage diversion structure is connected to the river 101 upstream of the upstream cofferdam 1, and the other end of the drainage diversion structure is connected to the downstream of the river 101. After the section of the river 101 between the downstream of the upstream cofferdam 1 and the outlet of the drainage diversion structure dries up, a construction site 12 is formed and a water-retaining structure 11 is constructed.

[0014] Furthermore, the drainage diversion structure includes a drainage hole 4, a drainage channel 6, and a diversion hole 9. The drainage hole 4 is located in a reservoir 100 on one side of the construction site 12. The drainage channel 6 is located in a river 101 between the construction site 12 and the water-retaining structure 11. The diversion hole 9 is located in a reservoir 100 on one side of the water-retaining structure 11. The drainage hole 4 is connected to the diversion hole 9 via the drainage channel 6.

[0015] Furthermore, the drainage tunnel 4 includes a drainage tunnel inlet 2, a drainage tunnel body 3, and a drainage tunnel outlet 5. The river channel 101 on the upstream side of the upstream cofferdam 1 is connected to the drainage tunnel inlet 2. The drainage tunnel inlet 2 is connected to the drainage tunnel outlet 5 via the drainage tunnel body 3. The drainage tunnel outlet 5 is connected to the drainage open channel 6. The drainage open channel 6 is connected to the diversion tunnel 9.

[0016] Furthermore, the diversion tunnel 9 includes a diversion tunnel inlet 7, a diversion tunnel body 8, and a diversion tunnel outlet 10. The drainage channel 6 is connected to the diversion tunnel inlet 7, and the diversion tunnel inlet 7 is connected to the diversion tunnel outlet 10 via the diversion tunnel body 8. The diversion tunnel outlet 10 is connected to the downstream of the river channel 101. To save on project investment, after the water-retaining structure 11 is completed, the diversion tunnel 9 can be converted into a flood discharge tunnel.

[0017] This utility model discloses a construction site layout structure under complex terrain conditions, and the construction process includes the following steps: S1: Within the inundation area of ​​the reservoir 100 upstream of the water-retaining structure 11, a suitable river channel 101 is selected as the construction site 12. The site selection principle is to avoid unstable landslides, debris flow gullies, and gullies with large flood volumes to avoid the safety risks they bring. The selected site should be as close as possible to the water-retaining structure 11, which can shorten the transportation distance of the excavated materials and save transportation costs, and facilitate the connection of the drainage tunnel outlet 5 and the diversion tunnel inlet 7 with the drainage open channel 6. S2: Drainage tunnel 4 is constructed in the mountain on one side of river channel 101. After the construction of drainage tunnel 4 is completed, upstream cofferdam 1 is constructed upstream of river channel 101 to cut off the water flow upstream of river channel 101. S3: After the upstream cofferdam 1 is completed, the water in the river channel 101 located upstream of the upstream cofferdam 1 will be diverted and drained through the drainage tunnel 4. A construction site 12 will be formed in the section of the river channel 101 between the drainage tunnel outlet 5 and the upstream cofferdam 1. The construction site 12 will be filled and leveled using the excavated material. The elevation of the construction site 12 after leveling should not be lower than the crest elevation of the upstream cofferdam 1 or the top elevation of the sidewall of the drainage channel 6, so that the water in the construction site 12 can flow into the upstream river channel 101 or the drainage channel 6 by gravity. The slope ratio of the construction site 12 should not be steeper than 1:2.5. After the construction site 12 is filled and leveled, the intercepting drainage ditch facilities around the construction site 12 should be improved. The end of the intercepting drainage ditch should be connected to the river channel above the upstream cofferdam 1 or the drainage channel 6. S4: Construct diversion tunnel 9 inside the mountain on one side of river channel 101; S5: During the dry season, construct drainage channel 6 to connect drainage tunnel 4 with diversion tunnel 9, thus completing the diversion and interception work of the project. S6: As required by the project construction, construct corresponding temporary facilities within the construction site 12 and construct water-retaining structures 11.

[0018] To expand the dry land construction area within the reservoir 100 inundation zone, the upstream cofferdam 1, originally adjacent to the water-retaining structure 11, is moved upstream of the river channel 101. A temporary drainage tunnel 4 is constructed within the reservoir 100. The drainage tunnel inlet 2 is located upstream of the upstream cofferdam 1, the drainage tunnel outlet 5 connects to the drainage channel 6, the drainage channel 6 downstream connects to the diversion tunnel inlet 7, and the diversion tunnel outlet 10 connects to the downstream of the river channel 101. The drainage tunnel 4 and diversion tunnel 9 are arranged on both banks of the river channel 101. The drainage tunnel outlet 5 and the diversion tunnel inlet 7 are connected sequentially by the drainage channel 6, ensuring smooth water flow. After the water flow upstream of the river channel 101 is diverted through the upstream cofferdam 1, drainage tunnel 4, drainage channel 6, and diversion tunnel 9, two dry land sites are formed in the middle section of the river channel 101. The dry land on the upstream side of the middle section of the river channel 101 (i.e., the river channel 101 between the upstream cofferdam 1 and the drainage channel 6) can be used to arrange the construction site 12, according to the project... The total amount of earth and rock excavated material is used to determine the elevation of the construction site 12 through earthwork balance. However, the elevation of the construction site 12 should not be lower than the top elevation of the upstream cofferdam 1 or the top elevation of the sidewall of the drainage channel 6, so that the water accumulated in the construction site 12 can be discharged into the upstream river channel 101 or the drainage channel 6 by gravity through intercepting and drainage ditches. Otherwise, a collection well should be set up in the construction site 12, and water should be pumped to the upstream river channel 101 or the drainage channel 6. The selection of the river channel 101 used for the construction site 12 should avoid unstable landslides, debris flow gullies and gullies with large flood volumes to avoid safety risks to the construction site. The construction site 12 can be filled and leveled with the excavated material to improve the utilization rate of the excavated material and reduce the amount of waste. The dry land on the downstream side (i.e., the river channel 101 between the drainage channel 6 and the outlet 10 of the diversion tunnel) provides conditions for the construction of the water-retaining structure 11.

[0019] The flood design standards for the upstream cofferdam 1, drainage tunnel 4, drainage open channel 6, and diversion tunnel 9 should be determined based on the diversion structure level and cofferdam structure form. Based on the determined flood design standards and flood flow, appropriate cross-sectional dimensions and corresponding discharge capacities of drainage tunnel 4, drainage open channel 6, and diversion tunnel 9 should be selected. The elevation of the backwater level in front of the upstream cofferdam 1 should be determined through hydraulic calculations. The elevation of the backwater level in front of the upstream cofferdam 1 plus the safety freeboard is the weir crest elevation.

[0020] Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples mentioned above. Any changes, additions or substitutions made by those skilled in the art within the scope of this utility model should be protected by this utility model.

Claims

1. A construction site layout structure under complex terrain conditions, comprising a reservoir (100) and a river channel (101) within the reservoir (100), characterized in that: The project includes an upstream cofferdam (1), which is located upstream of the river channel (101) in the reservoir (100). A drainage diversion structure is installed in the reservoir (100) on one side of the river channel (101). One end of the drainage diversion structure is connected to the river channel (101) upstream of the upstream cofferdam (1), and the other end of the drainage diversion structure is connected to the downstream of the river channel (101). After the section of the river channel (101) between the downstream of the upstream cofferdam (1) and the outlet of the drainage diversion structure dries up, a construction site (12) is formed and a water-retaining structure (11) is constructed.

2. The construction site layout structure in complex terrain conditions according to claim 1, characterized in that: The drainage diversion structure includes a drainage hole (4), a drainage channel (6), and a diversion hole (9). The drainage hole (4) is located in a reservoir (100) on one side of the construction site (12). The drainage channel (6) is located in a river (101) between the construction site (12) and the water-retaining structure (11). The diversion hole (9) is located in a reservoir (100) on one side of the water-retaining structure (11). The drainage hole (4) is connected to the diversion hole (9) via the drainage channel (6).

3. The construction site layout structure in complex terrain conditions according to claim 2, characterized in that: The drainage tunnel (4) includes a drainage tunnel inlet (2), a drainage tunnel body (3), and a drainage tunnel outlet (5). The river channel (101) on the upstream side of the upstream cofferdam (1) is connected to the drainage tunnel inlet (2). The drainage tunnel inlet (2) is connected to the drainage tunnel outlet (5) via the drainage tunnel body (3). The drainage tunnel outlet (5) is connected to the drainage channel (6). The drainage channel (6) is connected to the diversion tunnel (9).

4. The construction site layout structure in complex terrain conditions according to claim 3, characterized in that: The diversion tunnel (9) includes a diversion tunnel inlet (7), a diversion tunnel body (8), and a diversion tunnel outlet (10). The drainage channel (6) is connected to the diversion tunnel inlet (7). The diversion tunnel inlet (7) is connected to the diversion tunnel outlet (10) via the diversion tunnel body (8). The diversion tunnel outlet (10) is connected to the downstream of the river channel (101).

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