A cement-soil mixing pile head with anti-overflow and variable cross-section

Abstract

The invention discloses a cement-soil mixing pile head with a variable cross-section for anti-overflow, which includes a rotating rod, a bottom soil cutting blade, an edge blade cutter head, a horizontal stirring rod, a steel frame, a spiral blade, a hydraulic propulsion device, and a blade supporting steel. components such as blocks. Under the action of the power device, the pile head rotates clockwise downward to cut the soil. The blade at the bottom cuts the soil and cuts the soil into a loose shape. After reaching the design elevation, the cement slurry is injected into the soil through the grouting channel. The direction of rotation of the rod makes it rotate counterclockwise, and the helical blades press down the soil in the middle of the pile, so that the vertical composition of the soil is more uniform and the phenomenon of slurry overflow is effectively suppressed. The horizontal soil cutting blade expands outward under the promotion of the hydraulic propulsion device to increase the soil cutting area and achieve the effect of changing the diameter of the pile body. The stirring pile head can improve the pile-forming quality of the stirring pile, increase the bearing capacity of the pile body, and improve work efficiency. The invention also has the advantages of simple structure, convenient operation and easy implementation.

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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