Installation method of ultra-large diameter pressure steel pipe on inclined shaft lower curved section

Abstract

The invention discloses an installation method of an ultra-large diameter pressure steel pipe on the inclined shaft lower curved section. The method comprises the steps that the ultra-large diameter pressure steel pipe is assembled, steel pipe sections are transported in an adit, a formed steel pipe is positioned and installed on the inclined shaft lower curved section, the positioning and installing processes comprise the steps that a ground anchor and a traction steel cable are arranged on the inclined shaft upper horizontal section, the traction steel cable is connected with a traction climbing device and the ground anchor, and the traction climbing device is arranged at the lower end of the first section of the lower curved section pressure steel pipe; all single sections of the lowercurved section pressure steel pipe are subjected to assembly welding and climbing positioning fixation in sequence, and then the traction climbing device is removed to complete installation. Accordingly, traditional production line operation arrangement can be effectively simplified, hole assembly temporary facility arrangement is simplified, adit and main hole excavation sections are reduced, the pipe section assembly land area is reduced, land requirements for finished product stacking are canceled, pipe section secondary assembly welding once forming is achieved, the installation precisionis improved through mechanical assembly welding, hoisting and turning over are conducted without relying on an indigenous method, the safety risk is lowered, the installation construction period is shortened, the number of installation personnel is reduced, and the investment is saved.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering construction, in particular to the technical field of installation of hydropower equipment, and in particular to an automatic production and installation technology of a pressure steel pipe of a super-large-caliber hydroelectric generator in a bent section of an inclined shaft. Background technique [0002] In the traditional manufacturing of penstocks in the factory, multiple anti-circular platforms are used. The tiles after blanking and forming are hoisted to the platforms, and the circles are assembled and adjusted by tools such as presses and seam presses, and then welded by multiple welders. After welding, carry out non-destructive flaw detection inspection. After passing the pass, hand it over to the riveter for round adjustment, install the stiffening ring, and then hand it over to the welder for welding the stiffening ring butt joint and fillet weld. Th...

AI Technical Summary

Problems solved by technology

After the welding of the downstream pipe joints at the intersection of the branch tunnel and the main tunnel is completed, the round platform is removed, and the downstream positioning joint is installed upwards one by one, and concrete is poured for every three joints installed. This installation method requires a large amount of civil excavation and investment costs High, high safety risk, long construction period

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