Stress vibroflotation method large pericarpium lagenariae head squeezed dense sandrock pile construction method

Abstract

The invention provides a process which compels the vibroflotation of a large bottle gourd shaped device to compact sand-gravel pile, which is used for reinforcing the reclaimed silty clayey soil foundation of mud layers and silt stratifications. A chain-type compelling vibroflotation is formed by 2 to 5 vibrators; forces are continuously exerted to the reinforced soil according to the formation characteristics of the dredger fill layer, and process parameters and force control standards are constantly adjusted; at the same time, a plurality of sections of compaction piles in the shapes of large bottle gourds are formed via the dual functions of vibroflotation replacement and compaction, so as to quickly reduce the gaps in the soil body and enhance the compactness; most of the settlement of the reinforced soil is removed in a predeformation produced by the vibroflotation filling; for reinforcing the dredger fill foundation of ports, the force standard can be controlled between 0.7 and 0.95, and the construction of the cushion of the composite foundation dealt by rolling or vibration rolling compaction is carried out within 1 to 7 days after the vibroflotation operation.

Description

1. Technical field [0001] The invention belongs to the category of soft foundation strengthening treatment method, and is especially suitable for sandy dredging soil foundation with mud skin and soft silt layer. It is a new construction method for rapid treatment of uneven powder and fine filling soil foundation with mud skin and silt layer by adding filler. 2. Background technology [0002] There are hundreds or even thousands of soft foundation reinforcement treatment methods at home and abroad. For the reinforcement and treatment of large-area dredging soft soil in the land storage yard of newly-built and expanded ports, the traditional treatment methods mostly use surcharge preloading and overloading preloading. However, the processing cycle is too long and cannot meet the requirements of rapid construction or expansion of deep-water ports in recent years. Common construction methods such as vibrating, dynamic compaction, and rolling are available, but their efficiency ...

AI Technical Summary

Problems solved by technology

[0002] There are hundreds or even thousands of soft foundation reinforcement treatment methods at home and abroad. For the reinforcement and treatment of large-area dredging soft soil in the land storage yard of newly-built and expanded ports, the traditional treatment methods mostly use surcharge preloading and overloading preloading. However, the processing cycle is too long and cannot meet the requirements of rapid construction or expansion of deep-water ports in recent years

Common construction methods such as vibrating, dynamic compaction and rolling are available, but the efficiency is too low and the treatment depth is limited, which cannot meet the needs of rapid construction of modern container terminals such as large deep-water port heavy yards.

[0003] CN03115076.4 relates to a vibrating process without filler, but it is limited to its specific process and cannot fundamentally apply the force-giving principle to soft foundation soil to solve the problem, and there is no complete theoretical system support for the treatment design and construction. Its processing effect and benefits are more limited

[0004] CN1743560A is an applied construction method based on the principle of complete pre-force use. The design and construction have a complete theoretical system to firmly support it. Uneven soft silt layer, the effect of reinforcement will be more limited, and the uniformity of treatment quality will also be affected

[0005] CN200310117676 relates to a large-diameter thin-walled pipe pile composite foundation reinforcement soft foundation construction method, limited to its heavy model, it is very difficult to enter the soft treatment site, and the cost is very large, and there are many restrictions on pile connection

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