Long tunnel lining construction method

Abstract

The invention belongs to the technical field of water conservancy and hydropower construction engineering, and relates to a long tunnel lining construction method. The method comprises the following steps: a trolley is assembled; a scaffold is built; the top of a bearing bracket is adjusted to the bottom elevation of arch frames by adopting a concave adjustable support; the arch frames are mountedfrom upstream to downstream on stand column supports; the arch frames are connected by using phi 48 steel pipes as scissor supports; templates are mounted; side surface templates are in place; steelmolds are assembled; plane templates are assembled by adopting 3015 steel molds; side molds are adjusted and reinforced; the trolley is in place; edge top arch concrete is connected into a pump pipe for warehousing from the top arch downstream; elbow pipes and hoses are arranged in a warehouse; three edge wall concrete unloading points are arranged on each edge; the unloading points are used for unloading in turns; combination parts between old and new concrete layers are paved with cement mortar with thicknesses of 2-3 cm before concrete casting to meet cement mortar requirements; and the lining construction method achieves the advantages of a traditional frame arrangement method and overall construction of steel film trolleys, is low in production cost and high in construction speed, andcan recycle steel films and steel pipes to achieve energy conservation and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower construction engineering, and relates to a long tunnel lining construction method. Background technique [0002] At this stage, the development of the hydropower market is gradually shifting to remote areas, and construction in mountainous areas is often limited by terrain conditions, which brings greater difficulty to the overall construction layout. However, the secondary lining of the diversion tunnel of the small hydropower station has always been a difficult problem to deal with. The space is small, the distance is long, the construction period is short, the investment is large and the project changes frequently, which virtually increases the construction cost. The link of long tunnel lining is the most important link of project organization and construction. The quality of lining affects the service life of the project, and the progress of lining directly affects the...

AI Technical Summary

Problems solved by technology

[0002] At this stage, the development of the hydropower market is gradually shifting to remote areas, and construction in mountainous areas is often limited by terrain conditions, which brings greater difficulty to the overall construction layout

However, the secondary lining of the diversion tunnel of the small hydropower station has always been a relatively difficult problem to deal with. The small space, long distance, short construction period, large investment and frequent project changes have virtually increased the construction cost.

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