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...

Examples

Embodiment 1

[0037] A kind of method that polystyrene plate is used for mold bag concrete channel frost heave prevention: specifically as follows,

[0038] S1. Construction preparation

[0039] The foundation soil of the canal bed is compacted and the canal slope is leveled when the mold bag is laid. Concrete work should not be carried out when the temperature is below 4°C. The error of slope repair shall not exceed ±2cm, otherwise the exceeding part shall be backfilled with mortar.

[0040] S2, laying insulation board

[0041] After the canal slope is leveled, lay polystyrene insulation boards evenly and alignedly on the canal slope. The thickness of polystyrene insulation boards depends on the thickness of the mold bag concrete pouring; under the condition of 8cm mold bag concrete, the thickness of polystyrene board laying It is 4cm. as attached figure 1 As shown, the polystyrene board 2 is laid on the slope of the canal, and the membrane bag concrete 1 is located on the polystyrene...

Embodiment 2

[0049] The difference between embodiment 2 and embodiment 1 is that under the condition of 8cm mold bag concrete, the laying thickness of polystyrene board is 6cm;

Embodiment 3

[0051] The difference between embodiment 3 and embodiment 1 is that under the condition of 8cm mold bag concrete, the laying thickness of polystyrene board is 12cm;

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...

Examples

Embodiment 1

[0037] A kind of method that polystyrene plate is used for mold bag concrete channel frost heave prevention: specifically as follows,

[0038] S1. Construction preparation

[0039] The foundation soil of the canal bed is compacted and the canal slope is leveled when the mold bag is laid. Concrete work should not be carried out when the temperature is below 4°C. The error of slope repair shall not exceed ±2cm, otherwise the exceeding part shall be backfilled with mortar.

[0040] S2, laying insulation board

[0041] After the canal slope is leveled, lay polystyrene insulation boards evenly and alignedly on the canal slope. The thickness of polystyrene insulation boards depends on the thickness of the mold bag concrete pouring; under the condition of 8cm mold bag concrete, the thickness of polystyrene board laying It is 4cm. as attached figure 1 As shown, the polystyrene board 2 is laid on the slope of the canal, and the membrane bag concrete 1 is located on the polystyrene...

Embodiment 2

[0049] The difference between embodiment 2 and embodiment 1 is that under the condition of 8cm mold bag concrete, the laying thickness of polystyrene board is 6cm;

Embodiment 3

[0051] The difference between embodiment 3 and embodiment 1 is that under the condition of 8cm mold bag concrete, the laying thickness of polystyrene board is 12cm;

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