Method of reinforcing soft soil layers using layering mixing pile machine

Abstract

The invention discloses a method of reinforcing soft soil layers using a layering mixing pile machine. The method comprises the following steps: step 10), the layering mixing pile machine is in installed; step 20), a mixing head is controlled to the soft soil layers to be reinforced; step 30), the mixing head is spread; and step 40), cement soil mixing piles are prepared through the following steps: firstly, the soft soil layers are cut; an outer rod rotary speed controller drives an inner rod, an outer rod and the mixing head to rotate together, and meanwhile a slurry-feeding pump is started, cement paste or cement powder is conveyed to a cavity between the outer rod and the inner rod, then the soft soil and the cement paste or the cement powder is mixed through mixing blades, and cement soil is formed, and meanwhile, the outer rod rotary speed controller and the outer rod are matched to drive the mixing head to run upwards, and therefore the cement soil mixing piles are formed. The method of reinforcing the soft soil layers using the layering mixing pile machine can penetrate through the earth surface, a sand-interlaying soil layer or a hard soil layer, and reinforce a soft soil layer below the sand-interlaying soil layer or below the hard soil layer, and therefore save engineering construction cost.

Description

technical field [0001] The invention relates to the field of soft soil foundation reinforcement, in particular to a method for reinforcing soft soil layers by using a layered mixing pile machine. Background technique [0002] my country's coastal and riverside areas are the most economically developed areas in my country. The formation and rapid development of the three major economic circles in the Yangtze River Delta, Pearl River Delta and Bohai Rim have become an important engine for my country's economic development. At the same time, the coastal areas along the river are also the areas with the most intensive infrastructure construction in China. However, these developed areas along the coast and along the river are generally located in soft soil areas, and there is generally a certain thickness of soft soil within the depth range affected by engineering construction. Soft soil has the characteristics of low strength, high compressibility and high moisture content, so ...

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Problems solved by technology

[0006] (2) The reinforced soil layer is too single. If there is a certain thickness of sandy soil layer or hard soil layer in the soft soil, it is difficult for the existing mixing pile construction machinery to penetrate, which makes the distribution of deep sandy soil layer or hard soil layer. Soft soil cannot be effectively reinforced;

[0007] Due to the existence of the above problems, the application range of cement-soil mixing piles in foundation pit engineering has been affected

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