On-site pouring maintenance method of survey monument in high-latitude area and low-temperature environment

Abstract

An on-site pouring maintenance method of a survey monument in a high-latitude area and a low-temperature environment is characterized by comprising the following steps: (1) optimizing a cement variety; (2) choosing sand stones with small particle size, and appropriately reducing a water-cement ratio; (3) completing on-site pouring of the survey monument; (4) without taking out a template, directly backfilling with soil, so as to make flat with the ground; (5) preparing a bamboo pole support frame at a height of 3-5 cm above the standard surface; (6) covering the bamboo pole support frame with dry rice straws or stipa capillata linn and other hays with the thickness of 3-5 cm; (7) covering the rice straws with quick lime with the thickness of 5-10 cm, and allowing the quick lime to be separated by the rice straws; and (8) covering the quick lime material layer with a plastic thin film. The method has the advantages that with utilization of a theory that slaked lime and a large amount of heat are produced in a chemical reaction generated in a water absorption process of the quick lime, a heat preservation effect is played; the concrete coagulation time is greatly shortened, the maintenance function on the survey measurement is played, and a simple-operation, efficient and rapid pouring maintenance of the survey monument is achieved; and the method is low in price, simple and rapid, and efficient in heat release.

Description

technical field [0001] The invention relates to the field of making measurement markers, in particular to a maintenance method for pouring concrete markers in the field under low temperature environmental conditions of 0°C to minus 25°C in high latitude areas. Background technique [0002] Measuring markers are generally buried in highlands such as hilltops. In high latitude areas, the temperature in winter is very low. During the solidification process of concrete markers poured on site, when the temperature drops close to 0°C, the hardening speed of the concrete slows down and the strength is almost No more growth; when the temperature is lower than -3°C, the hydration of the concrete stops completely, and the free water inside will start to freeze, resulting in "ice swelling stress", which will cause the volume of the incompletely dried concrete body to expand, and the surface layer will freeze and crack Cracks are formed or cracked into scale-like fragments, which seriou...

AI Technical Summary

Problems solved by technology

[0002] Measuring markers are generally buried in highlands such as hilltops. In high latitude areas, the temperature in winter is very low. During the solidification process of concrete markers poured on site, when the temperature drops close to 0°C, the hardening speed of the concrete slows down and the strength is almost No more growth; when the temperature is lower than -3°C, th...

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