Large-flow, high-drop drainage drop well and its multi-layer energy dissipation construction method

Abstract

The invention discloses a high-flow-rate great-dropping-difference water discharging drop well and a multilayer energy dissipation construction method thereof. The drop well consists of a well body, a partition wall, a drop chamber, an overhaul chamber, a water inlet pipe and a water outlet pipe, wherein the well body is separated into the drop chamber and the overhaul chamber by the partition wall; the drop chamber comprises a well chamber and a hydraulic energy dissipation layer; the water inlet pipe communicates with the upper part of the well chamber; a grill energy dissipation layer is arranged in the well chamber, and comprises a plurality of pile beam groups separated at equal intervals; the two adjacent pile and beam groups are in longitudinal and transverse staggered arrangement in the space; the water outlet pipe is arranged in the overhaul chamber and communicates with the lower part of the well chamber through a water passing hole formed in the lower part of the partition wall; in addition, the bottom surface of the inner cavity of the water outlet pipe and the top surface of the hydraulic energy dissipation layer are at the same elevation; the upper part of the partition wall is provided with an exhaust hole communicating the well chamber with the overhaul chamber. The drop well can solve the energy dissipation problems of high flow rate and great dropping difference which are not related in the conventional water discharging drop well; meanwhile, the multilayer energy dissipation construction method has the land saving effect, and provides the reference for the design of the drop well in the constraint resource and dense pipe network building regions.

Description

technical field [0001] The invention belongs to the technical field of municipal drainage engineering, and relates to structures for falling water of urban drainage pipes, in particular to a large-flow, high-drop drainage falling well and a multi-layer energy dissipation construction method thereof. Background technique [0002] Municipal drainage pipes mainly include sewage pipes, rainwater pipes and combined rainwater and sewage pipes. All three pipelines involve the arrangement of inspection wells. According to the "Outdoor Drainage Design Code (GB50014-2006<2014 Edition>)" (referred to as the Outdoor Drainage Design Code, the same below), "The location of the inspection well should be located at the intersection, turning, pipe diameter or slope change, Drops and at regular intervals on straight pipe sections.” [0003] The drop well is an important form of the inspection well. The drop well is used to solve the energy dissipation problem of gravity flow drainage ...

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Problems solved by technology

[0007] In view of this, one of the objectives of the present invention is to provide a large-flow, high-drop drainage drop well to solve the energy dissipation problems of large flow and large drop that are not involved in traditional drainage drop wells; at the same time, the present invention The second purpose is to provide a multi-layer energy dissipation construction method with land-saving effect, and provide reference for the design of drop wells in built-up areas with tight land use and dense pipe network

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