Installation method of long drilled shaft and major diameter penstock in hydraulic and hydroelectric engineering

A technology of water conservancy and hydropower and pressure steel pipes, which is applied in water conservancy projects, hydropower, hydropower stations, etc., to shorten the installation time, solve the problem of measurement control, and speed up the construction speed

Active Publication Date: 2010-06-16
SINOHYDRO BUREAU 1 CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Provides a method for installing long shafts and large-diameter penstocks in water conservancy and hydropower projects, which efficiently and safely solves the problem of installing steel pipes with a diameter of 6-10 meters in vertical shafts of 320 meters to 600 meters

Method used

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Embodiment 1

[0015] 1. The hoisting height of steel pipes in the shaft section is 400m, and ordinary lifting equipment cannot meet the hoisting requirements. Therefore, a mobile gantry crane with a lifting weight of 40t and a lifting height of 400m is arranged above the shaft. This crane is a domestic 400m shaft. The steel pipe installation is used for the first time, and its advantage is that it can realize horizontal and vertical transportation, which solves the problem of steel pipe hoisting in deep shafts. At the same time, because the gantry crane has two hooks, it can be used flexibly according to the situation of heavy objects.

[0016] 2. The production and application of the shaft working platform: The shaft construction adopts a circular structure working platform, which can be lifted up and down in the pipe, with a height of 6 meters; it is divided into upper, middle and lower layers, and the height of each layer is 2 meters; the upper layer is arranged with lifting points, Durin...

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Abstract

The invention relates to a method for assembling a large-diameter steel pressure pipe in a long shaft in hydraulic and hydro-power engineering, which comprises the following steps: firstly, a movablegantry crane is arranged above the shaft; secondly, a shaft work platform provided with a circular structure is established; and thirdly, the steel pipe is measured and assembled by utilization of projected points of a laser plumbing instrument. The method has the advantages that: firstly, due to large lifting tonnage of the gantry crane, the problem of vertical transportation of the large-diameter steel pipe in the deep shaft is solved; secondly, due to adoption of the multilayered work platform during the construction process, the method increases the work surface, shortens the assembly time, realizes unprevailing cross-operation under the condition of guaranteeing safe construction, and improves the work efficiency; and thirdly, due to adoption of the high-precision laser plumbing instrument to project points from the bottom up and welding of a pedestal of the instrument on the assembled steel pipe, the method avoids measuring deviation due to repeated assembly of the instrument, solves the problem of measurement and control of the deep shaft, and simultaneously simplifies the construction procedure.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering. Background technique [0002] The gate shafts and water diversion shafts of conventional hydropower stations and pumped-storage power stations are generally constructed with a well depth of less than 320 meters. Generally, the construction method of excavating anti-guide wells by climbing tanks or hanging tanks, and then excavating from top to bottom, the depth is small. The vertical shaft can also be excavated by the hoisting and lifting "positive well method"; the lining concrete adopts the "conventional formwork method" or "hydraulic sliding form method" of the stereotyped formwork. The straight section of the Huilong water diversion shaft is more than 400 meters long, and the construction of the upper / lower bend section is added. If the bottom-up reverse shaft climbing method is used, the 1# traffic tunnel and the diversion tunnel steel pipe are required t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/06
CPCY02E10/22Y02E10/20
Inventor 李伟秦小慧茹彩江徐树文王显艳姜应德关景明赵冠群
Owner SINOHYDRO BUREAU 1 CO LTD
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