Integrated Corridor Layout Structure for Urban Flood Diversion

Abstract

The present invention relates to a comprehensive corridor layout structure for urban flood diversion, which belongs to the field of urban underground water conservancy projects and can be used in urban underground water conservancy projects, municipal engineering and other fields. In view of the insufficient flood control capacity of some sections of urban rivers, the current method of widening the river channel + dredging is generally still adopted, but it is extremely difficult to expropriate land around the river channel, so this method is difficult to implement. In view of this situation, the present invention considers combining terrain conditions to select suitable underground flood diversion channel inlets and outlets. The underground flood diversion channel lines are arranged under the municipal roads, and the underground pipelines along the line are collected in a comprehensive pipe gallery manner. The horizontal pipeline channels are arranged at intervals on the top plate of the comprehensive pipe gallery structure to solve the problem of pipelines crossing the street. The present invention effectively improves the flood control capacity of urban rivers and is conducive to alleviating waterlogging in the areas along the line.

Description

Technical Field

[0001] The present invention relates to a comprehensive corridor layout structure for urban flood diversion, belonging to the field of urban underground water conservancy projects, and can be used in fields such as urban underground water conservancy projects and municipal engineering. Background Art

[0002] In order to improve the flood control capacity of urban rivers, it is necessary to widen some sections of the existing river channels. Currently, the method of "widening the river channel + dredging" is generally still adopted. However, urban land is extremely valuable, and the land price along the river is even more expensive with the blessing of "river view", and it is extremely difficult to expropriate land around the river channel. Referring to Figure 1 , due to the influence of buildings on both sides of the river channel, many existing river channels do not have the conditions for widening. Therefore, the method of "widening the river channel + dredging" is very difficult to implement. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide an economically feasible comprehensive corridor layout structure for urban flood diversion to improve the flood control capacity of urban rivers.

[0004] The technical solution adopted by the present invention to solve the above technical problem is: a comprehensive corridor layout structure for urban flood diversion, including a river channel and a flood diversion channel arranged in the underground space of urban public land. The inlet of the flood diversion channel is connected to the upstream of the river channel, and the outlet of the flood diversion channel is connected to the downstream of the river channel.

[0005] Furthermore: the upper surface elevation of the bottom plate of the flood diversion channel inlet is higher than the upper surface elevation of the bottom plate of the flood diversion channel outlet, and along the length direction of the flood diversion channel, the upper surface of the bottom plate of the flood diversion channel is arranged in an overall slope shape.

[0006] Furthermore: the upper surface elevation of the bottom plate of the flood diversion channel inlet is lower than the river bottom elevation at the flood diversion channel inlet position, and the upper surface elevation of the bottom plate of the flood diversion channel outlet is higher than the river bottom elevation at the flood diversion channel outlet position.

[0007] Furthermore: the flood diversion channel is a cast-in-place concrete structure; the length of the flood diversion channel is less than the river channel length between the flood diversion channel inlet position and the outlet position.

[0008] Furthermore: a rainwater storage tank and a rainwater pipe network are arranged in the underground space of urban public land. The flood diversion channel also serves as a rainwater storage tank, and the drainage end of the rainwater pipe network is connected to the flood diversion channel through a pre-buried casing.

[0009] Furthermore: a corridor for laying pipelines is arranged on one side or both sides of the flood diversion channel.

[0010] Furthermore: the corridor includes a water supply and sewage storage tank, a power and communication cable storage tank, and a spare storage tank arranged in sequence from top to bottom in the vertical direction.

[0011] Furthermore, part of the flood diversion channel is located below the urban road, and pre-buried pipes or pre-buried pipe grooves that horizontally cross the urban road are arranged below the top of the flood diversion channel as pipeline crossing channels.

[0012] Furthermore, the pre-buried pipe groove is a U-shaped steel groove made by welding, and a detachable cover plate is arranged on the top of the U-shaped steel groove.

[0013] Furthermore, manholes are arranged at intervals along the length direction of the corridor on the top plate of the corridor, and the manholes are equipped with detachable top covers.

[0014] The beneficial effects of the present invention are as follows: During implementation, in combination with the topographic conditions, appropriate underground flood diversion channel inlets and outlets are selected, and the underground space of urban public lands such as municipal roads and green spaces is utilized to arrange the flood diversion channel. There is no problem of difficult land acquisition and it is easy to implement. Moreover, by using the underground space of urban public lands to construct the flood diversion channel, due to the limitation of the river bottom elevation at the inlets and outlets of the flood diversion channel, the buried depth is often relatively shallow, and generally open-cut construction is adopted, with less construction investment. The flood diversion channel is preferably made of cast-in-place concrete structure, and its roughness coefficient is much lower than that of the original river channel, resulting in better flood diversion effect. For the river channel area between the inlet position and the outlet position of the flood diversion channel, the flood diversion channel can be used for flood diversion, effectively improving the flood control ability of the urban river channel; and the river channel streamline is curved, while the underground flood diversion channel of the present invention can generally be designed to be relatively straight. Therefore, the distance between the inlets and outlets of the flood diversion channel is less than the length of the river channel, and the water level difference between their inlets and outlets is the same. Therefore, the bottom slope of the flood diversion channel is steeper than the river bottom slope, and the flood diversion effect is also better compared with the method of widening the river channel. In addition, the flood diversion channel can also be used as a rainwater storage tank, used as a flood and rainwater storage tank during the flood season and as a rainwater storage tank usually. Due to its large cross-sectional area, it can be used as a rainwater main pipe, which is conducive to connecting to the rainwater pipe network outflow of this river section and alleviating the waterlogging along this river section. Generally speaking, when using the flood diversion channel in the present invention for flood diversion, the flow velocity in the tank can reach 2 to 3 times that of the river channel, and the required flow-through area is more than half smaller than that of river channel flood diversion. Using the flood diversion channel for flood diversion is more efficient and more conducive to alleviating the waterlogging in the surrounding areas. When the soil cover thickness above the top plate of the flood diversion channel is relatively small, the pipeline crossing solution proposed by the present invention can solve the problem of pipeline crossing. Description of the Drawings

[0015] Figure 1 It is a schematic overall plane layout diagram of the river channel and the flood diversion channel during the implementation of the present invention;

[0016] Figure 2 It is a schematic plane layout diagram of the flood diversion channel of the present invention;

[0017] Figure 3 It is Figure 2 View A-A of

[0018] Figure 4 For Figure 2 the B-B view of;

[0019] Figure 5 For Figure 2 the C-C view of;

[0020] Figure 6 For Figure 2 the D-D view of;

[0021] Figure 7 For Figure 2 the E-E view of.

[0022] Markings in the figure: 1 - river channel, 2 - flood diversion channel, 3 - embedded pipe trench, 4 - urban road, 5 - cross-street sewage pipe, 6 - cross-street sewage pipe connection port, 7 - cross-street rainwater pipe, 8 - cross-street rainwater pipe connection port, 9 - water supply and sewage storage bin, 10 - power and communication cable storage bin, 11 - spare storage bin, 12 - embedded sleeve, 13 - embedded waterproof sleeve, 14 - cover plate, 15 - access hole, 16 - building, 17 - greening and sidewalk. Specific implementation manner

[0023] For the convenience of understanding and implementing the present invention, preferred embodiments of the present invention are selected and further described in conjunction with the accompanying drawings.

[0024] As Figures 1 to 7 shown, the present invention includes a river channel 1 and a flood diversion channel 2 arranged in the underground space of urban public land. The inlet of the flood diversion channel 2 is connected to the upstream of the river channel 1, and the outlet of the flood diversion channel 2 is connected to the downstream of the river channel 1. In specific implementation, in combination with the topographic conditions, appropriate inlets and outlets of the flood diversion channel 2 can be selected.

[0025] In order to better achieve the flood diversion effect and facilitate implementation, the elevation of the upper surface of the bottom plate of the inlet of the flood diversion channel 2 in the present invention is higher than the elevation of the upper surface of the bottom plate of the outlet of the flood diversion channel 2, and along the length direction of the flood diversion channel 2, the upper surface of the bottom plate of the flood diversion channel 2 is integrally arranged in a slope shape. The slope of the upper surface of the bottom plate of the flood diversion channel 2 is designed according to the actual situation, and there is no special requirement. The greater the slope, the higher the flood diversion efficiency of the flood diversion channel 2.

[0026] The upper surface elevation of the inlet bottom plate of the flood diversion channel 2 is preferably set lower than the bottom elevation of the river channel 1 at the inlet position of the flood diversion channel 2, which is beneficial to improving the flood diversion effect. The upper surface elevation of the outlet bottom plate of the flood diversion channel 2 is preferably set higher than the bottom elevation of the river channel 1 at the outlet position of the flood diversion channel 2, which can avoid the existence of reverse slope, is beneficial to the outflow of flood water, and is not easy to silt up with sediment. There is no special requirement for the elevation of the inlet top plate of the flood diversion channel 2 in the present invention. If the elevation of the inlet top plate is lower than the water level of the river channel 1 at its location, there will be a section of pressurized flow; if the elevation of the inlet top plate is higher than the water level of the river channel 1 at its location, the whole process will be unpressurized flow.

[0027] When selecting the specific layout route of the flood diversion channel 2, it should be arranged as much as possible in the bend section of the river channel and straightened as much as possible, so that the length of the flood diversion channel 2 can be less than the length of the river channel 1 between the inlet position and the outlet position of the flood diversion channel 2, which is beneficial to meeting the elevation difference requirements of the inlet and outlet of the flood diversion channel 2 to improve the flood diversion efficiency. Moreover, the shorter length of the flood diversion channel 2 can also save construction investment. The flood diversion channel 2 is preferably made of cast-in-place concrete structure, and its roughness coefficient is much lower than that of the original river channel, and the flood diversion effect is better.

[0028] The flood diversion channel 2 in the present invention is preferably presented in the form of an integrated utility tunnel. The specific implementation method is that a rainwater storage tank and a rainwater pipe network are arranged in the underground space of urban public land. The flood diversion channel 2 also serves as a rainwater storage tank, and the drainage end of the rainwater pipe network is connected to the flood diversion channel 2 through a pre-buried sleeve 12. In addition, corridors for laying pipelines can be arranged on one side or both sides of the flood diversion channel 2. The layout form of single flood diversion channel 2 + single-sided corridor is adopted in this embodiment. In specific implementation, it can also be arranged in the following forms according to the road width and the flood volume to pass through: double flood diversion channels 2 + single-sided corridor, double flood diversion channels 2 + double-sided corridor, single flood diversion channel 2 + double-sided corridor. The corridor can be made into an integral concrete structure with the flood diversion channel 2.

[0029] The corridor can be laid out according to the types of pipelines along the line. The preferred implementation adopted in this embodiment is that the corridor includes a water supply and sewage storage tank 9, a power and communication cable storage tank 10, and a spare storage tank 11 arranged in sequence from top to bottom vertically. This layout method is more convenient for installing and maintaining pipelines.

[0030] For the convenience of construction, the flood diversion channel 2 should be arranged along the urban road 4 as much as possible. For the partial segment of the flood diversion channel 2 located below the urban road 4, a pre-buried pipeline or a pre-buried pipe trench 3 that transversely passes through the urban road 4 is arranged below the top of the flood diversion channel 2 as a pipeline crossing passage. When the soil cover thickness above the top plate of the flood diversion channel 2 is relatively small, the problem of pipeline crossing can be solved by the pre-buried pipeline or the pre-buried pipe trench 3 arranged as above. The pipelines can be arranged in the pre-buried pipeline or the pre-buried pipe trench 3 according to the actual situation. In this embodiment, a cross-street sewage pipe 5 is arranged in some of the pre-buried pipe trenches 3, and the cross-street sewage pipe 5 is connected from the top plate position of the corridor to the water supply and sewage storage bin 9; a cross-street rainwater pipe 7 is arranged in some of the pre-buried pipe trenches 3, and the cross-street rainwater pipe 7 communicates with the flood diversion channel 2 from the top plate position of the flood diversion channel 2 for drainage.

[0031] The pre-buried pipe trench 3 is preferably realized in the following way: the pre-buried pipe trench 3 is a U-shaped steel groove made by welding, and a detachable cover plate 14 is arranged at the top of the U-shaped steel groove. The cover plate 14 is usually also made of a steel plate, and the overall installation is relatively convenient. A water stop structure can be arranged between the U-shaped steel groove and the cover plate 14 to ensure the sealing performance.

[0032] Manholes 15 are arranged at intervals along the length direction of the corridor on the top plate of the corridor, and the manholes 15 are provided with detachable top covers. The pipelines in the corridor can be conveniently maintained through the manholes 15.

Claims

1. An integrated corridor layout structure for urban flood diversion, including a river channel (1), characterized in that: It further includes a flood diversion channel (2) arranged in the underground space of urban public land. The inlet of the flood diversion channel (2) is connected to the upstream of the river channel (1), and the outlet of the flood diversion channel (2) is connected to the downstream of the river channel (1). A rainwater storage tank and a rainwater pipe network are arranged in the underground space of urban public land. The flood diversion channel (2) also serves as a rainwater storage tank, and the drainage end of the rainwater pipe network is connected to the flood diversion channel (2) through a pre-buried sleeve (12). Corridors for laying pipelines are arranged on one or both sides of the flood diversion channel (2). The corridor includes a water supply and sewage storage tank (9), a power and communication cable storage tank (10), and a spare storage tank (11) arranged successively from top to bottom in the vertical direction. Part of the flood diversion channel (2) is located below the urban road (4), and a pre-buried pipe or a pre-buried pipe groove (3) that transversely passes through the urban road (4) is arranged below the top of the flood diversion channel (2) under the urban road (4) as a pipeline crossing passage.

2. The comprehensive corridor layout structure for urban flood diversion according to claim 1, characterized in that: The elevation of the upper surface of the bottom plate of the inlet of the flood diversion channel (2) is higher than the elevation of the upper surface of the bottom plate of the outlet of the flood diversion channel (2), and along the length direction of the flood diversion channel (2), the upper surface of the bottom plate of the flood diversion channel (2) is integrally arranged in a slope shape.

3. The comprehensive corridor layout structure for urban flood diversion as described in claim 1, wherein: The elevation of the upper surface of the bottom plate of the inlet of the flood diversion channel (2) is lower than the elevation of the bottom surface of the river channel (1) at the inlet position of the flood diversion channel (2); the elevation of the upper surface of the bottom plate of the outlet of the flood diversion channel (2) is higher than the elevation of the bottom surface of the river channel (1) at the outlet position of the flood diversion channel (2).

4. The integrated corridor layout structure for urban flood diversion according to claim 1, wherein: The flood diversion channel (2) is a cast-in-place concrete structure, and the length of the flood diversion channel (2) is less than the length of the river channel (1) between the inlet position and the outlet position of the flood diversion channel (2).

5. The comprehensive corridor layout structure for urban flood diversion according to any one of claims 1 to 4, characterized in that: The pre-buried pipe groove (3) is a U-shaped steel groove made by welding, and a detachable cover plate (14) is provided on the top of the U-shaped steel groove.

6. The integrated corridor layout structure for urban flood diversion according to any one of claims 1 to 4, characterized in that: Manholes (15) are arranged at intervals along the length direction of the corridor on the top plate of the corridor, and the manholes (15) are provided with detachable top covers.

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