Construction method and structure of dam toe hydropower station workshop retaining wall

Abstract

The invention discloses a construction method and structure of a dam toe hydropower station workshop retaining wall. The method is characterized in that after a foundation pit of a workshop is excavated, firstly, the workshop retaining wall is constructed at the side, close to an earth and rockfill dam, of the foundation pit, an obstruction barrier is formed between the workshop and the earth and rockfill dam, and therefore the phenomenon that large construction rocks of the earth and rockfill dam roll into the foundation pit of the workshop, so that safety of the workshop structure and construction personnel is endangered is prevented. The workshop retaining wall is constructed according to the following steps: A, concrete construction of a balance weight platform is performed; B, sloping core concrete construction is performed on the balance weight platform; and C, rock ballast backfilling is performed on the upper portion of the balance weight platform and the outer side of the sloping core. The construction method and structure are set in combination with the retaining wall of the end of the workshop, the construction structure can be used as a permanent retention wall structure of the workshop, and engineering investment is saved; a transportation channel is arranged in the wall and is connected with a construction adit of a pressure steel pipe, and construction of the pressure steel pipe is facilitated; and rock ballast backfilling is performed on the outer side of the wall, and therefore the wall can be connected with a workshop entering roadway, and the transportation problem for entering the workshop is solved. The construction method and structure have the prominent advantage that multiple purposes of one wall are achieved, water diversion lines are shortened, and project investment is saved.

Description

technical field [0001] The invention relates to a construction method and structure of a retaining wall of a factory building of a Bajiao hydropower station, and belongs to the technical field of construction engineering of a factory building of a Bajiao hydropower station. Background technique [0002] In hydropower projects, the power plant is often arranged on the river bank close to the foot of the earth-rock dam. When building a power plant at present, the plant foundation pit is directly excavated at the dam foot of the earth-rock dam, the plant foundation is poured in the foundation pit, and then the plant construction is carried out. Since the factory building is close to the earth-rock dam, large rocks may roll into the foundation pit of the factory building during the construction of the earth-rock dam, seriously affecting the construction safety of the factory building. In addition, the layout of penstock construction branch tunnels and access roads is relatively...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method and structure for the retaining wall of the powerhouse of the dam foot hydropower station, so as to solve the safety problem of the powerhouse construction; The layout of the construction branch tunnel and the access road to overcome the deficiencies of the existing technology

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