High-bearing-force thin-wall steel tube concrete pile construction method and device and application thereof

Abstract

The invention provides a high-bearing-force thin-wall steel tube concrete pile construction method and device and application thereof. An inward-beating method is used for achieving high bearing force, the technology of weakening the pile hole soil is used for solving the problem about the construction efficiency of the inward-beating method, the device is used for solving the problem about buffering and corrosion prevention, and therefore high-bearing-force thin-wall steel tube concrete pile construction has feasibility, the pile forming quality is good, the use amount of steel is small, operation is easy, control is easy, construction efficiency is high, reliable corrosion prevention is formed, durability and the mechanical property are good, and cost performance is high.

Description

technical field [0001] The invention relates to a construction method and device of an engineering pile and an application thereof, and belongs to the technical field of construction. Background technique [0002] The thin-walled steel pipe referred to in the present invention generally refers to a steel pipe with a ratio of diameter to wall thickness greater than 20. The cost of steel pipes determines that only thin-walled steel pipe concrete piles can truly be competitive in the market. [0003] The high bearing capacity referred to in the present invention generally means that the compressive bearing capacity of the thin-walled concrete filled steel pipe pile is not lower than 50% of the design value of the axial compressive bearing capacity of the corresponding short concrete filled steel tube column. For example: the steel pipe is D426*4.2 spiral steel pipe, Q235 material, pouring C50 concrete, load design value / load standard value = 1.3, pile-forming process coefficie...

AI Technical Summary

Problems solved by technology

[0007] 1. The drop hammer directly hits the spud shoe without cushioning, resulting in a large impact force on the steel pipe, and a high risk of the steel pipe being damaged. The direct impact of the hammer bottom and the spud shoe will also cause damage to the hammer bottom and the spud shoe;

[0008] 2. There is no buffer, and the problem that the steel pipe may be damaged by the lateral expansion of the buffer material during hammering is not considered. This problem is particularly prominent for thin-walled steel pipes;

[0009] 3. The diameter of the spud shoe is basically the same as that of the steel pipe, so it is difficult to solve the anti-corrosion problem of the steel pipe with a protective layer. If the anti-corrosion coating is used, the anti-corrosion coating is easily damaged, and the anti-corrosion effect cannot be guaranteed

[0012] To sum up, the existing technology and devices are unable to efficiently and reliably make thin-walled steel pipe concrete piles with high bearing capacity.

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