Slurry overflow preventing variable cross-section cement-soil mixing pile head

Abstract

The invention discloses a slurry overflow preventing variable cross-section cement-soil mixing pile head which comprises a rotating rod, a bottom soil cutting blade, an edge blade tool bit, horizontalmixing rods, a steel frame framework, a spiral blade, a hydraulic propelling device, a blade supporting rigid block and other components. The pile head is rotated clockwise under the effect of a power device to cut soil downwards, a bottom blade cuts soil to be in a loosened state, after the height reaches the designed elevation, cement slurry is grouted into soil through a grouting channel, at the moment, the rotating direction of the rotating rod is changed, the rotating rod is rotated anticlockwise, the spiral blade presses down soil in the middle of a pile body, therefore, vertical ingredients of soil are more uniform, and the slurry overflow phenomenon is effectively restrained. The horizontal soil cutting blade is expanded outwards under propelling of the hydraulic propelling device, the soil cutting area is increased, and the effect of changing the diameter of the pile body is achieved. By means of the mixing pile head, the pile forming quality of mixing piles can be improved,the pile body bearing capacity can be improved, and the working efficiency can be improved. The slurry overflow preventing variable cross-section cement-soil mixing pile head has the advantages of being simple in structure, convenient to operate and easy to implement.

Description

technical field [0001] The invention relates to the field of building construction equipment, in particular to a cement-soil mixing pile head with variable cross-section for anti-overflow. Background technique [0002] Soft soil foundation is widely distributed in economically developed areas such as the southeast coast of my country and inland river and lake basins. The soft soil is loose, high in compressibility, and low in shear strength; it has high sensitivity, structural properties, and obvious rheology. Therefore, when building buildings on soft soil foundations, special attention must be paid to the deformation and stability of soft soil. Soft soil foundation reinforcement is a major technical problem faced by civil engineering construction fields such as urban construction, rail transit, highways, railways, airports, and municipal engineering. [0003] At present, there are many treatment methods for soft ground, such as compaction, drainage consolidation, etc., an...

AI Technical Summary

Problems solved by technology

However, there are some defects in the current construction technology of cement-soil mixing piles. The pile quality is unstable, the pile body is delaminated, and the pile body is not mixed vertically, resulting in the pile body being in the shape of a thousand-layer cake, and the cement slurry is poured into the pile. When the foundation is in the ground, because the density is smaller than that of the soil, the cement slurry will go up, resulting in uneven distribution of cement slurry and uneven strength of the pile body.

The shape of the pile body is single, the strength of the pile body is low, and the diameter of the pile body will become smaller locally. These technical problems often lead to engineering quality problems such as large settlement deformation, cracking, slope instability, and sudden collapse in soft soil areas. The cost even affects the normal operation

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