Pile foundation rock-entering judgment method and system based on drilling machine current

Abstract

The invention provides a pile foundation rock-entering judgment method and system based on drilling machine current. The method comprises the steps that constructing a pile foundation rock stratum strength and drilling machine real-time current function relational expression; performing trial hole forming in the to-be-constructed area, and obtaining first real-time current data in the drilling process of the drilling machine; correcting the function relational expression according to the first real-time current data, and establishing a pile foundation rock-entering judgment standard; and acquiring a second real-time current of the drilling machine in pile foundation pore-forming construction, comparing the second real-time current with the pile foundation rock-entering judgment standard, and judging that the pile foundation enters the rock when the second real-time current meets the pile foundation rock-entering judgment standard. The rock-entering judgment standard is obtained by constructing the function relation between the pile foundation rock stratum strength and the real-time current strength of the drilling machine, the current of the drilling machine is judged in real timeaccording to the rock-entering judgment standard, core drilling or rock slag analysis is not needed, the judgment time is saved, the engineering cost is reduced, and the judgment accuracy is guaranteed.

Description

technical field [0001] The invention relates to the field of pile foundation engineering, in particular to a method and system for judging pile foundation rock entry based on drilling rig current. Background technique [0002] In pile foundation engineering, especially for rock-socketed piles that use strongly weathered and above-strength bedrock as the bearing layer, the depth of the pile tip entering the bedrock is particularly important for the bearing capacity and safe use of the foundation. The determination of rock is the key factor to ensure the quality of pile foundation construction. [0003] At present, two methods are mainly used to determine the rock entry. One is to drill cores at each pile position and analyze them to clarify the elevation of the top surface of the bedrock and determine the final elevation of the pile tip. However, this method is complicated and affects the construction progress. The project cost is increased; the second is to collect the rock...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method and system for judging pile foundation rock entry based on drilling rig current, aiming to solve the problems of cumbersome pile foundation rock entry judgment methods and low accuracy of judgment results in existing pile foundation rock entry judgment methods

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