Enclosing Wall Soil Bags Foundation Indoor Model Test

With the rapid development of the national economy, science and technology, the increasingly progress of foundation treatment and reinforcement technology is becoming more diverse. How to strengthen the foundation of the original foundation is more safe, economical and quick. In soft soil area with poor geological conditions, the bearing capacity of foundation soil is lower,the building will not be uniform, and the damage of buildings will be very large.This article in the original friction type sandbag reinforcement foundation for further improvement, keep the friction between the original sand bags to prevent sand from the lateral displacement and adding outside the walls and solid with the use, the formation of a special kind of composite foundation model. The composite foundation is by the wall and solid and sandbags to bear the load together, they constitute a composite foundation. In above laid a certain thickness of raft, cushion thickness and the thickness of foundation cushion. According to the stress form of composite foundation, the composite foundation can be divided into horizontal reinforcement and vertical reinforcement. And vertical reinforcement composite foundation is the pile foundation, we can will be bagged sand foundation and external wall type and solid interaction as vertical reinforcement, and through increased sandbag between friction friction type bagged sand foundation reinforcement method and outside wall body of sandbags to bound as transverse reinforcement composite foundation, it has a reinforced soil can effectively improve the integrity of the reinforcement and foundation soil, so as to improve the effect of the strength of the foundation soil.The foundation treatment method is the project site will be adverse soil dug up and packed in polypropylene bags, and then on the excavation of the soil bin of mechanical compaction treating to the design elevation, the loaded sandbag in accordance with section of the stacked placed,finally pit backfill, backfill and mechanical compaction treating.This paper is based on the design of the idea, the indoor model test based on the completion of the. In the indoor model test, we used specifications for 1# sealed bag, size 60*40*15mm plastic self bags instead of in the design of plastic woven bag, test from Chifeng City in Inner Mongolia desert from the product of fine sand to simulate practical engineering of undisturbed soil. In the course of the trial, in turn, changes each test sandbag quantity and piling method, a total of 9 in the experimental group, ensure each test, the top-level sandbag is apart from loading device height is certain(30mm), at the end of each experiment, on the fine sand in the sand tank is out of all, and then follow the fixed filling of sand backfill, as far as possible to reduce man-made initial disturbance. At the end of the whole experiment, the experimental results of the 9 groups were integrated, analyzed and compared. The results of the method can greatly improve thebearing capacity of foundation soil, reduce the settlement of foundation and uneven settlement,and hope to provide data and theoretical support for future study and research. And the prospect of the foundation treatment method is also applied to any soil area, especially in the coastal soft soil and the northwest sandy area.