Axial lifting driving structure for drill rods of pile driver for cement mixing piles

Abstract

The invention belongs to the technical field of building equipment, and particularly relates to an axial lifting driving structure for drill rods of a pile driver for cement mixing piles. The problem that an existing pile driver for cement mixing piles cannot achieve drilling properly is solved. The axial lifting driving structure comprises a driving box body with an inner cavity. The driving box body is provided with at least one drill rod body which is arranged in the vertical direction and can rotate circumferentially. One end of the drill rod body penetrates in the driving box body. An axial driving mechanism is arranged between the drill rod body and the driving box body, wherein the axial driving mechanism can drive the drill rod body to vertically slide in a reciprocating mode when the drill rod body is in a circumferentially-rotary state or in a circumferentially-stationary state. The axial lifting driving structure for the drill rods of the pile driver for the cement mixing piles has the advantages that the drill rod body can be stretched in the axial direction and also can slide in the axial direction during circumferential rotation, and the phenomenon that drilling cannot be achieved tends not to happen; drilling efficiency is improved, the perimeter of the cross section of each cement mixing pile is increased after construction, the pull-out capacity of the cement mixing piles is improved, and the mixing homogeneity is improved as well.

Description

Technical field [0001] The invention belongs to the technical field of construction equipment, and in particular relates to a drill rod axial lifting drive structure of a cement-soil mixing pile driver. Background technique [0002] Cement-soil mixing pile is a method used to reinforce the low foundation of saturated soft clay. It uses cement as a curing agent, through a special mixing machine, the soft soil and curing agent are forced to stir in the depth of the foundation, using the curing agent and soft soil A series of physical and chemical reactions between them make the soft soil harden into a high-quality foundation with integrity, water stability and certain strength. Common piling machines for cement-soil mixing piles mostly use multiple drill pipes to work at the same time to drill holes. However, in actual construction, due to the hardness of the soil or when encountering hard objects such as rocks, the drill pipe is likely to be unable to drill. Phenomenon, this redu...

AI Technical Summary

Problems solved by technology

The above scheme solves the problem of low drilling efficiency of the existing cement-soil mixing pile machine to a certain extent, but the scheme still exists: the drill pipe cannot be drilled, the drilling is difficult, and the stability is poor.

Images