Soft soil foundation treatment and construction method by using mixing pile and anti-floating anchor rod

Abstract

The invention discloses a soft soil foundation treatment and construction method of a mixing pile anti-floating anchor bar, which specifically includes the following construction process: construction preparation → pile driver in place → cement soil mixing pile → construction before initial setting of cement soil Insert the anchor rod into the ground and end at 100mm from the bottom of the mixing pile → grouting → cut off the excess steel pipe at the design level on the top surface of the foundation bottom plate → anchor the anchor rod into the bottom plate, and weld the steel plate at the end to form the mixing pile and the anchor rod The anti-pull reinforcement pile; the anchor rod is a barbed steel pipe structure. It is a new type of effective method to simultaneously solve the disturbance and anti-floating difficulties in the construction of the soft soil bearing layer. It solves many anti-floating problems in areas with thick soft soil. It can not only treat the foundation but also improve the uplift bearing capacity. It is convenient for construction and meets the requirements of anti-floating. It adopts shallow foundation instead of pile foundation, which greatly saves the cost and has good construction quality.

Description

technical field [0001] The invention relates to a foundation treatment and construction method, in particular to a soft soil foundation treatment and construction method by a mixing pile anti-floating anchor rod. Background technique [0002] With the continuous development of civil construction in my country, more and more pure outdoor basements are built on soft soil foundations, and the anti-floating problem of the foundations has become a key link in the design. [0003] For pure outdoor basements in soft soil areas (such as muddy silty clay in the bearing layer), due to the high anti-floating water level, the traditional foundation design scheme generally adopts pile foundations, which can resist both compression and pullout, but the cost of pile foundations is high And the construction is difficult. [0004] The load of the purely outdoor basement is small, and the general bearing capacity of the soft soil foundation as the bearing layer can meet the design requiremen...

AI Technical Summary

Problems solved by technology

Deep foundations generally use pile foundations, which can bear both vertical loads and pullout forces. This kind of scheme is easy to control in quality and good in reliability, but often the cost is very high and the construction period is long

The other one adopts a shallow foundation. This kind of scheme needs to strengthen the foundation. There are various treatment methods, and a suitable reinforcement scheme can be selected according to the actual situation. However, for deep soft foundations, the anti-floating treat...

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