Anti-frostbite swelling method for mold bag concrete channel through polystyrene board

Abstract

The invention discloses an anti-frostbite swelling method for a mold bag concrete channel through a polystyrene board and belongs to the technical field of channel projects. The anti-frostbite swelling method for the mold bag concrete channel through the polystyrene board comprises the following steps that channel bed foundation soil a mold bag to be laid is compacted, and a channel slope is flattened; after the channel slope is flattened, the polystyrene board is laid on the channel slope face, and the thickness of the polystyrene board is 4 cm-12 cm; and the mold bag is laid on an insulationboard, before filling of concrete, the mold bag is soaked with water, and the thickness of the mold bag concrete is controlled to be 8 cm-15 cm. By laying the polystyrene board in a mold bag concretechannel lining, the frostbite swelling deformation of the channel foundation soil can be reduced, the frostbite swelling damage is restrained, the service life of a channel can also be prolonged, andthe maintaining cost of the channel is reduced.

Description

technical field [0001] The invention relates to the technical field of canal engineering, in particular to a method for using polystyrene boards to prevent frost heave in molded concrete canals. Background technique [0002] The Hetao irrigation area belongs to the temperate continental arid and semi-arid climate zone. The winter is long and cold, and it is a seasonal permafrost region. The freezing and thawing process of the foundation soil is generally frozen in mid-October, and thawed in late May of the following year. In some years, it can be thawed until early June, forming a freeze-thaw cycle. The freezing lasted about 180d to 240d, and the freezing index was 536 to 3450°C d. The foundation soil of the channel was mostly loam and silty loam, which belonged to strong frost-heaving soil. Affected by irrigation water, the groundwater level was relatively high. Influenced by factors such as soil quality and groundwater level, the irrigation area has become an area with s...

AI Technical Summary

Problems solved by technology

The main problem of canal scrapping is that the Hetao irrigation area is a seasonally frozen soil area, the soil quality of the canal is strong frost-heaving soil, the buried depth of groundwater is relatively shallow, and the soil moisture content before freezing is large.

[0004] In recent years, molded bag concrete has been used as the main material in the water-saving reconstruction project of the backbone channel in the Hetao irrigation area, and has been used in many backbone channels such as the South Main Canal and the Yangjia River Main Canal. The molded bag concrete lining channel has the advantages of convenient construction and short project time. , time-saving, and labor-saving advantages, but the problems of channel frost heaving and damage are difficult to solve

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