Original soil strengthen pile sinking method and its construction apparatus

Abstract

The invention discloses a method of crude soil solidifying pile sinking used in building operation and its construction device. The method of pile sinking is that cut moving is stirred into stirred cut crude soil as pre-selected at pre-calculated position of the ground base; prepared curing agent is pressed into the stirred cut crude soil and stirred uniformly into solidified soil; the prefabricated pile is sunk into the solidified soil, the ground base is formed into crude soil solidified pile base. The construction device includes bottom head, stirring machine upright equipped on the bottom head, deep lift stirring machine equipped on the stirring machine upright, pile driver upright equipped on the bottom head, pile driver equipped on the pile diver upright. The advantage of the ground base formed by this method is high intension, strong bearing capacity, and low cost.

Description

technical field [0001] The invention relates to a foundation construction method, in particular to a construction method of a composite pile foundation having the characteristics of both deep-layer mixing piles and prefabricated piles. The invention also relates to a construction device using the original soil solidification pile sinking method. Background technique [0002] The soft soil foundation has a large void ratio, high water content, low shear strength, high compressibility coefficient, low permeability coefficient, and long settlement stability time, so it is difficult to directly carry out building construction on the soft soil layer. However, in actual building construction, it is unavoidable to encounter soft soil foundation construction conditions. Especially in recent years, according to urban development planning and effective use of land resources, construction on soft soil foundations is often required. Therefore, it is necessary to improve and strengthen ...

AI Technical Summary

Problems solved by technology

Deep mixing is to use cement, lime and other materials as curing agents to forcefully stir the original soft soil and curing agent deep in the foundation to form a reinforced foundation. Although this method makes the soft soil form an integral and certain The strength of the foundation, but the allowable bearing capacity of a single pile is insufficient, the strength of the pile body cannot be guaranteed, and the friction coefficient around the pile is low, which still easily causes uneven subsidence and inclination of the building

The long pile sinking method is to bury the concrete prefabricated pile in the soft soil layer to form the pile foundation. Although the bearing capacity and pile quality of the pile foundation are easy to guarantee and the corrosion resistance is high, it is not suitable for industrial and civil buildings. , in order to achieve the ideal bearing effect, it not only consumes more steel, but also requires the cross-sectional area of ​​the pile to be large enough and the length of the pile to be long enough, which results in high project cost and long construction period; at the same time, this construction method It is also necessary to have large-scale pile foundation construction machinery and equipment to match it, which increases the construction cost of pile foundation

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