Given force splitting mud jacking enhancement type composite foundation construction method

Abstract

The invention relates to a given force splitting and grouting reinforced type composite foundation construction method which is used for reinforcing the foundation of hydraulic fill sand soil and mixed fill soil; the given force effect is continuously exerted on the soil body by a borer and sleeve type high-pressure grouting equipment; a grouting pipe is inserted to a straight hole position or a slant hole position; a prepared granular mixed grout is poured to the grouting pipe for a veined splitting continuous grouting in order that the grout can form a vein-dissevering shaped and beaded shaped grout-coated concretion body and a pilaster-shaped grout-coated concretion body in a proper part of the soil body and form an uneven composite foundation with the soil body; for the reinforcement of the hydraulic fill sand soil, the standard of the given force is controlled in a scope of 0.78 to 0.92; for the reinforcement of the mixed fill soil; the standard of the given force is controlled in a scope of 0.82 to 0.94; the given force control standard is utilized to achieve the need of the compactness of the reinforced type grouting composite foundation.

Description

1. Technical field [0001] The invention belongs to the category of weak ground reinforcement treatment method. It is especially suitable for strengthening dredger fill sandy soil and miscellaneous fill foundation. It is a new construction method of ground soil reinforcement with force splitting compaction replacement type high-pressure grouting and rapid gelling. At the same time, it is also a fast, efficient and easy new construction method for the treatment of pathological accidents in foundation engineering of existing buildings and the application of foundation underpinning technology. 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 land storage yards of newly-built and expanded ports, the traditional treatment methods mostly use surcharge preloading and overloading preloading methods. However, the process...

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 land storage yards of newly-built and expanded ports, the traditional treatment methods mostly use surcharge preloading and overloading preloading methods. 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 vibratory impact method, dynamic compaction method and rolling method are available, but the efficiency is too low, and the processing depth is also limited, which cannot meet the needs of rapid construction of modern container terminals such as large deep-water ports.

[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] For the reinforcement of non-uniform miscellaneous fill foundations, commonly used construction methods such as rolling method, vibratory impact method and dynamic compaction method are available, but construction in urban areas is subject to many restrictions, and disturbing environmental factors such as vibration, noise and sewage discharge affect citizens. Normal life, coupled with space restrictions in downtown areas, the above methods are generally inconvenient to use

[0006] CN200310117676 relates to a kind of large-diameter thin-walled pipe pile composite ground reinforcement soft foundation engineering method, although the static pressure process is feasible, but limited to its heavy machine type, it is often very difficult to directly enter the soft and miscellaneous fill treatment site, and the cost is very large. There are also more restrictions in the pile

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