Pipeline laying and concrete structure in high-fall pipe well and construction method

Abstract

The invention discloses a pipeline laying and concrete structure in a high-fall pipe well and a construction method, and aims to solve the problem that a high-fall vertical shaft is small in space and personnel cannot enter the vertical shaft to install a pipeline and guarantee the safety of the personnel, the welding quality of the pipeline and the feasibility of a test scheme in the pipeline installation process. The structure comprises an upper equipment room, a lower equipment room, a high-fall vertical shaft and a plurality of water supply and drainage steel pipes, the water supply and drainage steel pipes are vertically arranged in the high-fall vertical shaft, and a backfill concrete structure is arranged in the high-fall vertical shaft. The construction method comprises the steps that firstly, an upper-layer equipment room and a lower-part equipment room are excavated, and a high-fall vertical shaft is excavated; hoisting water supply and drainage steel pipes; and the excavated high-fall vertical shaft is subjected to segmented concrete backfilling. When the fall of the pipe well exceeds a certain height, the pipe well can be divided into several sections of high-fall pipe wells, and similar or identical pipeline laying and concrete structures and construction methods are arranged.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a pipeline laying in a high-drop tube well, a concrete structure and a construction method. Background technique [0002] In water conservancy and hydropower projects, a large number of underground caverns are set up to arrange equipment to meet the needs of facility operation, which also includes more water supply systems, leakage or maintenance drainage systems. These water supply and drainage systems are affected or limited by the tail water level of the downstream river channel, and the water supply and drainage pipelines are all set above the highest downstream tail water level, because the underground caverns are isolated from the downstream tail water level by thick rock mass. In order to find a simple, smooth, and safe drainage line, sometimes vertical shafts with a drop of tens of meters or even hundreds of meters have to be drilled i...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a pipeline laying, concrete structure and construction method in a high-drop tube well, aiming to solve the problem that the space of a high-drop shaft is small and personnel cannot enter the shaft to install pipelines, and to ensure the safety of personnel and pipeline installation during pipeline installation. Welding quality and the feasibility of the test plan; at the same time, after the pipeline installation is completed, design a reasonable and safe high-drop shaft backfill concrete structure, and determine the sequence and timing of concrete pouring to ensure the installed drainage pipeline and well structure Safety

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