Construction method for constructing filling pile with electric drill and rotary digging relay drill

Abstract

The invention discloses a construction method of cast-in-situ piles constructed by electric drill and rotary drilling relay drill, which includes two stages of construction preparation and construction operation; the construction preparation stage includes: 1) construction technology preparation stage; 2) site preparation stage; 3), mud preparation and circulation stage; 4), construction machinery, raw material preparation. Using this construction method mainly improves the utilization rate of machinery, speeds up the speed of hole formation, and shortens the time of hole formation. Electric drill construction in soft soil layer is more economical than rotary excavation pile machine, and the speed is faster than rotary excavation. The depth of rock penetration is difficult to judge and other problems. According to the construction records of the pile test stage, the electric drill has a footage of about 30cm / hour in the 5-1 weakly cemented conglomerate layer, and the 5-2 medium cemented conglomerate layer has a footage of about 10cm / hour, and the speed of the rotary pile machine in the 5-1 weakly cemented conglomerate layer is about 100cm / hour, the speed of 5‑2 medium cemented conglomerate layer is about 50cm / hour, and the speed is greatly improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method suitable for various types of poor soil quality such as miscellaneous fill soil, plain fill soil, muddy silty clay, silty clay, silt, silt sand, and silty fine sand in the upper soil layer. Soil layer, the lower soil layer is weakly cemented conglomerate, medium cemented conglomerate and other soft rocks and hard rocks, electric drill and rotary drilling relay drill The construction method of cast-in-place piles. Background technique [0002] With the continuous progress of science and technology, especially the rapid development of road transportation and the continuous acceleration of urbanization driven by the development of science and technology, high-rise buildings have sprung up like mushrooms after a spring rain. In construction, cast-in-place piles are more common A kind of construction. [0003] At present, cast-in-place piles are mainly divided into bore...

AI Technical Summary

Problems solved by technology

Especially in the filling soil and soft soil stratum, hole collapse and shrinkage are prone to occur; the contact surface between the drill barrel of the rotary pile machine and the soil is relatively large. While increasing the uplift load of the rotary excavation pile body, it will have an adverse effect on the stability of the hole wall, and it is easy to cause the hole wall to shrink

Images