CN102409747B - Rainwater drainage system with shallow rainwater storage adjusting structure - Google Patents

Abstract

The invention discloses a rainwater drainage system with a shallow rainwater regulation and storage structure, which at least includes an upstream inspection well, a downstream inspection well, and a through main pipeline; a shallow rainwater is arranged in parallel between the upstream inspection well and the downstream inspection well Adjustment and storage structure; an overflow weir is also set in the upstream inspection well to form an overflow area. The top of the overflow weir is flush with the inner top of the inlet pipe of the upstream inspection well. Connected, the outlet pipe is connected with the downstream inspection well. In the rainwater drainage system of the present invention, since the shallow rainwater storage structure is set, when the rainfall intensity exceeds the original design standard of the rainwater drainage system, the excess rainwater will overflow into the shallow storage structure through the overflow weir in the upstream inspection well , and then slowly discharged to the downstream inspection well. The obvious beneficial effect of the invention is that the flood control standard of the rainwater drainage system is improved, or the rainstorm exceeding the standard is stored, and the possibility of waterlogging in the upstream area is reduced.

Description

Rainwater drainage system with shallow rainwater regulation and storage structure

technical field

The invention relates to the field of rain and flood technology, in particular to a rainwater drainage system with a shallow rainwater regulation and storage structure.

Background technique

With the expansion of urbanized areas and the increase in the intensity of construction and development in urbanized areas, the hydrological and meteorological conditions in urbanized areas have changed in recent years, resulting in an increase in the frequency and intensity of rainstorms year by year, and urban flood control is facing more and more severe challenges. In this case, to further reduce rain and flood disasters, maintain the normal and stable operation of urban public infrastructure, and ensure the safety of residents' lives and properties, new requirements are put forward for rain and flood facilities.

The existing urban rainwater pipe network system is always designed based on a certain design rainstorm return period. Rainfall events within the design standard will not cause waterlogging problems, but rainfall events higher than the design standard may cause waterlogging and water accumulation . Therefore, in theory, designing the rainwater pipe network system according to the maximum rainfall intensity can completely avoid waterlogging disasters. However, the duration of high-intensity rainfall is generally short, which means that the duration of large surface runoff is also short, and the frequency of occurrence is not high. Therefore, due to the uncertainty and small probability characteristics of the maximum rainfall intensity, it is neither realistic nor economical to design the rainwater pipe network system according to the maximum rainfall intensity in actual situations.

The existing rainwater drainage system in my country is generally composed of rainwater outlets, rainwater pipes, and pump stations (with pump drainage systems, but without self-drainage systems). In some areas, there is a storage tank at the end of the combined drainage system (of which the rainwater pipe network is a part), but the function of the storage tank is mainly to reduce the pollution of the rainwater when it is discharged to the river, rather than to improve the drainage capacity.

As shown in FIG. 1 , an existing rainwater drainage system mainly includes an upstream inspection well, a downstream inspection well, and pipes running through them. When the rainfall intensity is within the original design standard, Q1=Q2, that is, there will be no waterlogging in the upstream area. However, when the rainfall intensity exceeds the original design standard, the flow in the pipeline increases, and the head loss increases accordingly. When the flow reaches a certain level, the liquid level in the upstream inspection well is higher than the ground, resulting in waterlogging.

Therefore, those skilled in the art are devoting themselves to developing a rainwater drainage system with a shallow rainwater regulation and storage structure with improved drainage capacity.

Contents of the invention

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a rainwater drainage system with a shallow rainwater regulation and storage structure with improved drainage capacity.

In order to achieve the above purpose, the present invention provides a rainwater drainage system with a shallow rainwater storage structure, at least including an upstream inspection well, a downstream inspection well, and a through main pipeline; between the upstream inspection well and the downstream inspection well A shallow rainwater regulation and storage structure is arranged in parallel between the wells; an overflow weir is also arranged in the upstream inspection well to form an overflow area, and the top of the overflow weir is flush with the water inlet pipe of the upstream inspection well Flat, the water inlet pipe of the shallow rainwater regulation and storage structure communicates with the overflow area in the upstream inspection well, and the outlet pipe of the shallow rainwater regulation and storage structure communicates with the downstream inspection well.

In a specific implementation, the water inlet pipe of the shallow rainwater regulation and storage structure enters from the top of the shallow rainwater regulation and storage structure, and the outlet pipe of the shallow rainwater regulation and storage structure Bottom export.

In different implementations, the shallow rainwater regulation and storage structure is a tubular storage tank or a box culvert storage tank.

In other implementations, multiple shallow rainwater regulation and storage structures are set in the rainwater drainage system.

In different implementations, the shallow rainwater regulation and storage structure is arranged in the middle or at the beginning of the existing rainwater drainage system.

The rainwater drainage system with a shallow rainwater storage structure of the present invention is an online adjustment system. Since the online adjustment shallow rainwater storage structure is set, when the rainfall intensity exceeds the original design standard of the rainwater drainage system, the excessive rainwater In the upstream inspection well, it overflows into the shallow storage structure through the overflow weir, and then slowly discharges to the downstream inspection well.

In this way, the present invention delays the discharge of flood peak flow, and its significant beneficial effect is to improve the flood control standard of the rainwater drainage system, or to store the storm that exceeds the standard, and to reduce the possibility of waterlogging in the upstream area.

The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

Description of drawings

Fig. 1 is a structural schematic diagram of a rainwater regulation and storage system in the prior art.

Fig. 2 is a structural schematic diagram of a specific embodiment of the rainwater drainage system of the present invention.

Detailed ways

As shown in FIG. 2 , a specific embodiment of the rainwater drainage system of the present invention includes an upstream inspection well with an inflow flow rate of Q1 , a downstream inspection well with an output flow rate of Q2 , and a through main pipe.

In the present invention, between the upstream inspection well and the downstream inspection well, a shallow rainwater regulation and storage structure for regulation is arranged in parallel with the main pipeline. At the same time, the present invention also adds an overflow weir 1 in the existing upstream inspection well to form an overflow area in the upstream inspection well. The weir crest of the overflow weir 1 is flush with the inner top of the water inlet pipe of the upstream inspection well, and the overflow area is connected with the water inlet pipe of the shallow rainwater regulation and storage structure.

The shallow rainwater storage structure can be a tubular storage tank or a box culvert storage tank, the water inlet pipe enters from the top of the shallow rainwater storage structure, and the outlet pipe is led out from the bottom of the shallow rainwater storage structure .

In the specific design, the inflow flow rate Q3 of the shallow rainwater regulation and storage structure is a flow rate exceeding the design standard of the existing system, and the outflow flow rate is Q4, and the design Q4≤Q3.

In particular, as an optimized implementation, the shallow rainwater regulation and storage structure can be arranged in the middle or at the beginning of the existing rainwater drainage system. Preferably, it can be installed in the green belts of residential quarters and municipal roads.

In different embodiments, according to the adjustment of flood control standards and the requirements of the construction environment, multiple shallow rainwater regulation and storage structures mentioned above can also be arranged in the rainwater drainage system.

For the newly built rainwater drainage system, due to the adoption of this rainwater drainage system with a shallow storage structure, the flood peak flow from the upstream that is higher than the design standard will be stored in the shallow storage structure. Discharge to the downstream, which can reduce the design pipe diameter of the downstream rainwater drainage system.

For the rainwater drainage system that has been built, such shallow rainwater storage structures can be added at key nodes to improve the flood control standard of the rainwater drainage system in the upstream area.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (5)

1. the drainage system against rain with the shallow rainwater storage structure, at least comprise upstream manhole, downstream manhole, and the main pipeline connected; It is characterized in that: between described upstream manhole and described downstream manhole, be arranged in parallel the shallow rainwater storage structure; Also be provided with overflow weir in the manhole of described upstream to form overflow area, the weir crest of described overflow weir flushes with the interior top of the water inlet pipe pipe of described upstream manhole, the water inlet pipe of described shallow rainwater storage structure is communicated with the described overflow area in the manhole of described upstream, and the outlet pipe of described shallow rainwater storage structure is communicated with described downstream manhole.

2. drainage system against rain as claimed in claim 1, it is characterized in that: described shallow rainwater storage structure is tubular type reservoir or box culvert-type reservoir.

3. drainage system against rain as claimed in claim 1, is characterized in that: be provided with a plurality of shallow rainwater storage structures in described drainage system against rain.

4. as claim 1 or 2 or 3 described drainage system against rain, it is characterized in that: the water inlet pipe of described shallow rainwater storage structure is entered by the top of described shallow rainwater storage structure, and the outlet pipe of described shallow rainwater storage structure is derived by the bottom of described shallow rainwater storage structure.

5. as claim 1 or 2 or 3 described drainage system against rain, it is characterized in that: described shallow rainwater storage structure is arranged on the middle part of existing drainage system against rain or plays end.