Turn-back type stepped drop well

Abstract

The invention discloses a turn-back type stepped drop well and relates to the field of drainage engineering, in particular to a structure of hydraulic drop of urban drainage pipelines, wherein the structure is applicable to rainwater pipes or sewage pipes with the diameter d being 700 mm-1650 mm and the drop difference being 2 m-6 m. The drop well is mainly composed of a well body, a partition wall, a hydraulic drop chamber, an operation chamber, a water inlet pipe and a water outlet pipe. An upper stepped plate, a middle stepped plate and a lower stepped plate are arranged in the hydraulic drop chamber and are mutually arranged in a turn-back mode, and therefore the size of the drop well can be effectively reduced. The defect that in the prior art, the drop difference of a drop well with a big pipe diameter is small is overcome; the stepped plates are arranged in the turn-back mode, so that the size of the drop well is reduced; the space below the stepped plates are effectively utilized, the size of filled concrete or brick setting is reduced, and the work amount of foundation pit excavation is reduced, and therefore the construction cost is lowered; the hydraulic drop chamber is separated from the operation chamber, so that maintenance operations in the well are facilitated.

Description

technical field [0001] The invention relates to a turn-back type stepped water drop well, relates to the field of drainage engineering, in particular to a structure for water drop of urban drainage pipes. Background technique [0002] Most of the urban drainage is discharged through hidden pipes, and the branch pipes collect rainwater or sewage, collect it into the main pipe, and finally collect it into the main pipe and discharge it into the water body or sewage treatment plant. Drainage pipes need to be equipped with inspection wells at places such as turns, pipe diameter changes, slope changes, and pipe bottom elevation changes. When the upstream pipe is connected to the downstream pipe and there is a high elevation, the water flow from the upstream pipe into the inspection well will have a greater impact on the bottom of the well. , drop wells should be set. In the design of drainage pipelines in the prior art, standard drawings are generally used for the falling wells....

AI Technical Summary

Problems solved by technology

If the drop difference between the upstream and downstream pipelines is 6m, according to the method of lengthening the well chamber, the inner dimension of the drop well will reach 11m. This method needs to fill the lower part of the step of the drop well with concrete or brick masonry, and the excavation of the foundation pit during construction is also very large. Large, construction difficulty and project cost will be greatly increased, and some projects cannot occupy a large underground space for construction due to the influence of underground structures, underground pipelines, etc.

[0003] In the prior art, the upstream and downstream pipelines and steps of the stepped drop well are in the same well room, and it is very inconvenient to maintain the well when there is water flow.

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