A Composite Rigid Core Pile with Stirring Thread Special-shaped Consolidation Body and Its Construction Method

Abstract

The invention provides a composite steel core pile for a stirring and spraying threaded special-shaped induration. The composite steel core pile for the stirring and spraying threaded special-shaped induration comprises an outer pile and an inner pile, wherein the outer pile wraps the outer side of the inner pile, and threads are formed on the surface of the outer pile. A construction method for the composite steel core pile for the stirring and spraying threaded special-shaped induration is characterized in that the construction method is arbitrary one of two methods of constructing the outer pile firstly and then the inner pile or constructing the inner pile firstly and then the outer pile. The composite steel core pile and the construction method have the advantages that 1, the bearing capacity of the pile is greatly improved, and the economy is greatly increased; and under the same conditions, the side friction of the pile is improved by 15-28 percent compared with that of an ordinary composite pile; 2, the mechanical efficiency of constructing the inner pile is greatly improved; 3, the bearing capacity of the composite pile is improved, the settling reliability is high, the cost is low, pollution does not exist, and the quality of a pile body is stable; and 4, the problem of the composite pile for resisting pile pulling is solved, and the application range of the composite pile is enlarged.

Description

technical field [0001] The invention relates to a composite rigid-core pile of a special-shaped solidified body with stirring spray threads and a construction method thereof, belonging to the field of civil engineering. Background technique [0002] Composite piles are widely used in pile foundations, composite pile foundations, composite foundations, coastal areas, riverside areas, lakeside areas, highways, high-speed railway soft soil foundations, airports, docks, and storage yards in the above-mentioned areas. . [0003] The Chinese patent "Concrete Core Cement-Soil Mixing Pile Machine and Its Construction Process" (ZL200510041006.4) and the Chinese patent "Construction Machinery for Cement-Soil Core-inserted Composite Pile" (ZL200410093838.6) disclose a cement-soil pile inner core The construction method and construction machinery of the composite pile, on the basis of the completion of the construction of the cement-soil mixing pile or the high-pressure rotary grouting...

AI Technical Summary

Problems solved by technology

[0004] 1. The surface of the cylindrical composite pile is relatively smooth, and the frictional resistance between the pile and soil is small, which limits the full play of the composite pile's compressive and uplifting frictional resistance;

[0005] 2. The outer pile must be fixedly constructed first, and then the inner pile must be constructed, and the inner pile must be made within 6 hours of forming the outer pile, and the mechanical efficiency is low;

[0006] 3. The concentricity and sag of the inner and outer piles cannot be guaranteed, so the bearing capacity of the composite pile has a large dispersion;

[0007] 4. The consolidation material of the cement-soil pile is a single cement slurry. If the foundation soil is acidic soil (such as peat soil, polluted soil, etc.), the cement curing agent has almost no curing effect on the soil particles, which limits the application range of the composite pile.

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