Construction method for upstream-side wall body of semi-underground power station plant

Abstract

The invention discloses a construction method for an upstream-side wall body of a semi-underground power station plant, comprising a power station plant with a concrete structure, wherein a rear pouring zone is poured along the longitudinal middle line of the upstream-side wall body positioned on the underground part of the power station plant; steel wire meshes are distributed on the contact surface of the rear pouring zone and the corresponding upstream-side wall body; water-swelling water seals are respectively distributed along the longitudinal line of each steel wire mesh; red copper water seal sheets are respectively distributed on the joint of the rear pouring zone and the corresponding upstream-side wall body; multiple layers of butted seam reinforcing steel bars are distributed from bottom to top in the upstream-side wall body and are distributed in a mode of horizontally penetrating through the rear pouring zone; before the upstream-side wall body is poured, a polyethylene closed-cell foam plate is arranged on the outer surface of the upstream-side wall body; drain tanks are distributed along the bottom of the upper outside backfilling groove of the upstream-side wall body; sand-free concrete cushion plies are respectively spread on the bottom and the side surface of the backfilling groove; and concrete blocks are backfilled to the backfilling groove. The semi-underground power station plant built with the construction method has the advantages of simple structure, safety and reliability, low cost, small size of a power station plant structure and the like.

Description

technical field [0001] The invention relates to the powerhouse structure of a power station, in particular to a construction method of the upstream side wall of a semi-underground powerhouse and the design of an external drainage system. Background technique [0002] The embedded rock wall of the upstream side wall of the semi-underground power plant is generally arranged on the bank of the river downstream of the water diversion system, which is a form of power plant often used in the design of hydropower plants. For the semi-underground power plant, due to its equipment requirements, it is generally a large-span (30m-80m) and high side wall (20m-30m) structure. The main force-bearing structure of the power station is located below the ground, and has the characteristics of high groundwater level, high water pressure, and lack of constraints on the side walls above the generator floor. According to the design and construction specifications, a deformation joint is set ever...

AI Technical Summary

Problems solved by technology

According to the design and construction specifications, the underground wall structure is provided with a deformation joint every 20m-30m. When the side wall is under the action of horizontal load when the joint is divided, the displacement of the upstream side wall is too large, which is difficult to meet the operation requirements of the bridge crane of the power station.

In order to meet the operation requirements of the bridge crane in the power station, the wall is currently thickened and a large number of structural steel bars are arranged, which greatly increases the construction cost

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