Construction method of cast-in-place pile by artificial digging hole under extreme cold climate in winter

Abstract

The invention discloses a construction method of a cast-in-place pile by an artificial digging hole under the extreme cold climate in winter. The construction method comprises the following steps: (1) when a pile diameter is designed, reducing pile number and increasing the pile diameter on the basis of not increasing cost; (2) employing hole-digging workers with the experience of winter construction in north, and providing the essential winter construction labor protection appliances for the artificial digging hole work, and arranging a soft ladder at the hole opening of the hole digging work; (3) carrying out hole-digging work tool and stirring of a pile core concrete under the heating condition; (4) transporting concrete by adopting a concrete tanker, coating heat insulation cotton at the periphery of a charging tank of the concrete tanker; (5) keeping that the pouring height of the pile core concrete is at least 1.0m higher than the standard height of the designed pile roof, covering the heat insulation material simultaneously and covering soil at the upper part of the heat insulation cotton. The construction method has the following advantages: by applying the construction method of the system, the unceasing project construction under the extreme cold climate in winter can be guaranteed, the work limit of the project can be speeded up, thus the project is put into production as early as possible to bring the investment benefit for owners early.

Description

technical field [0001] The technology of the invention relates to the technical field of geotechnical engineering construction, in particular to a construction method of artificially digging holes in cast-in-situ piles in severe cold weather in winter. Background technique [0002] At present, in the field of engineering construction in my country, it is stipulated that the average outdoor and field temperature is continuously below 5°C, which means that it belongs to winter construction work, and corresponding heat preservation and heating measures must be taken before engineering construction can be carried out. In the north of my country, the outdoor temperature often reaches -5°C to -20°C in winter. Under such severe cold and low temperature operating conditions, if no scientific measures are taken, conventional manual hole digging operations and concrete mixing, transportation and pouring operations are basically impossible to carry out. Standstill. In order to overcom...

AI Technical Summary

Problems solved by technology

In the north of my country, the outdoor temperature often reaches -5°C to -20°C in winter. Under such severe cold and low temperature operating conditions, if no scientific measures are taken, conventional manual hole digging operations and concrete mixing, transportation and pouring operations are basically impossible to carry out. standstill

In order to overcome the difficulty of manual hole digging and concrete mixing, transportation and pouring in severe cold and low temperature climates, the present invention provides a series of processes and operating technical methods to ensure smooth pile digging by manual hole diggers, normal operation of machinery, and concrete mold entry temperature and maintenance Temperature, create good working conditions to ensure smooth operation in winter

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