Square pile wire cutting device and mechanical excavation method of hard rock stratum square pile

Abstract

The invention relates to the technical field of excavation of square piles, and discloses a square pile wire cutting device and a mechanical excavation method of a hard rock stratum square pile. The method comprises the following steps that site leveling is carried out; measuring and paying off are carried out; circular pile hole construction is performed; a rotary drilling machine is utilized, and a round pile hole is excavated in the middle of the square pile until the design depth of the pile hole is reached; square pile hole contour line cutting is carried out, wherein the square pile wirecutting device is used for performing layer-by-layer cutting along the square pile hole contour line, the cutting depth of each time is 500-1000 mm, rocks in the square pile hole is cut into multipleblocky stones with smaller size; slag removal of the square pile hole is carried out, wherein the rotary drilling machine is utilized, the block stones in the square pile hole are crushed, lifted anddischarged, and the first layer of excavation is completed; and the step 4 and the step 5 are repeated, and cutting and slag removal are performed layer by layer until the design depth of the squarepile hole is reached. According to the square pile wire cutting device, the mechanical degree is high, construction precision is high, construction quality is stable, control is easy, and constructionefficiency is high.

Description

technical field [0001] The invention relates to the technical field of excavation of square piles, in particular to a square pile line cutting device and a mechanical excavation method for square piles in hard rock formations. Background technique [0002] Due to its own structure, square piles have better mechanical properties than circular piles. Compared with circular piles, square piles have a larger side friction area in the case of equal cross-section and equal materials, so they have greater side friction. The bearing capacity of square piles is better than that of round piles. [0003] At present, the equipment used for pile hole forming on the market is mainly rotary excavator, but the rotary excavator can only be directly used for the hole-forming construction of circular piles, while the construction of square piles is mainly the traditional manual hole-digging pile construction technology. Personnel use small cutting machines or water drills to drill holes. The ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved is: the existing construction method of the square pile is highly dependent on the construction personnel's operation level and objective conditions, the verticality and flatness of the pile hole are largely affected by human factors, and there is a problem that the pile hole is easy to Problems with large tilting and twisting deformation rates, poor construction quality stability, difficult control, low construction efficiency, and high safety risks

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