Soft soil foundation reinforcement method

Abstract

The invention relates to a soft soil foundation reinforcement method. The soft soil foundation reinforcement method comprises the following steps that S1, pre-construction preparation is carried out; S1-1, a head pipe, unit pipe bodies and connecting pipe bodies are prepared, and installation holes are formed in the unit pipe bodies; S1-2, lofting is carried out to determine pile positions of mixing piles on the upper surface of a soil layer; S1-3, a first working well and a second working well are excavated; S2, a cross beam is constructed, the head pipe, the unit pipe bodies and the connecting pipe bodies are lifted to enter the first working well sequentially according to the design, a jack is started to push to enable all the unit pipe bodies and the connecting pipe bodies to be combined into a transverse channel in the soil layer, the installation holes directly face the pile positions, a grouting pipe is inserted into one end of the transverse channel and penetrates through the other end of the transverse channel, and mortar is injected into the transverse channel through the grouting pipe; and S3, the mixing piles are constructed, holes are drilled in the positions corresponding to the pile positions on the soil layer to form pile holes, a curing agent is injected into the pile holes, and the curing agent and soil at the positions of the installation holes are mixed by a rotating shaft to form the mixing piles. The soft soil foundation reinforcement method improves the connection strength between the adjacent mixing piles.

Description

technical field [0001] The invention relates to the technical field of foundation reinforcement, in particular to a soft soil foundation reinforcement method. Background technique [0002] The soft soil foundation is mainly composed of loose and soft soil with a large content of fine particles such as clay and silt, organic soil with large pores, peat and loose sand. The nature of soft soil foundation varies from place to place, from layer to layer, and is highly unpredictable. Moreover, the bearing capacity of the soft soil foundation is very low or the bearing capacity becomes very low after being disturbed, which cannot meet the construction requirements. Therefore, it is necessary to strengthen the soft soil foundation to form a foundation that can carry the building. [0003] The Chinese patent with the authorized announcement number CN 101793021 B discloses a foundation reinforcement method for pre-added aggregate mixing piles, which is suitable for soft soil or soft...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the mixing piles are usually directly operated on the soil layer by using the mixing pile machine, and after the construction of the mixing piles is completed, there is no connection relationship between adjacent mixing piles

Even if the ground beam is constructed on the pile top of the mixing pile in the later construction process, good integrity between adjacent mixing piles cannot be achieved

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