Multifunctional stress dispersing type expansive concrete steel pipe pile and construction method

Abstract

The invention relates to a multifunctional stress dispersing type expansive concrete steel pipe pile and a construction method. The steel pipe pile serves as a main structure. Holes in different formsare evenly distributed in a pile body, and expansive concrete is poured into the pile body or the expansive concrete and ordinary concrete are poured into the pile body segment by segment, a high-pressure grouting process is used in cooperation, stress dispersing expansive bodies in different forms are formed near the holes, meanwhile, a certain number of broken stones are selectively added, thecost is saved, the bottom end can be sealed through the ordinary concrete, and the bottom end can also be combined with a claw-type support to form a composite foundation. The reinforcing effect is obvious, the construction speed is high, the stress is evenly dispersed along the pile length, forward stress dispersing expansive bodies and backward stress dispersing expansive bodies achieve good compression resisting performance, anti-pulling performance and anti-floating performance, differential settlement is effectively reduced, and different pile types and construction methods can be selected according to different foundations.

Description

technical field [0001] The invention relates to the fields of architecture and civil engineering construction, in particular to a multifunctional stress-dispersing expansion concrete steel pipe pile and a construction method. Background technique [0002] In recent years, with the development of economy and science and technology, the construction industry has developed rapidly. In order to improve the stability of the building and the bearing capacity of the foundation, the foundation type of building construction in my country generally chooses pile foundation. According to the purpose and structural characteristics of the building, as well as the requirements for the foundation, different pile foundation types and construction techniques can be selected to ensure the safety of the building. [0003] The foundation piles used for buildings can be roughly divided into: steel pipe piles, concrete piles and cast-in-place piles. Steel pipe piles have high overall strength, go...

AI Technical Summary

Problems solved by technology

Steel pipe piles have high overall strength, good tensile and compressive resistance, and uniform material. Compared with concrete prefabricated piles, they are light and strong, easy to transport, and fast in construction. However, ordinary steel pipe piles have small surface friction and are easy to settle. , and easy to separate from the internal concrete; the concrete pile has good compressive performance and low cost, but its tensile performance is poor, so it cannot be used as an uplift pile, and it is prone to cracks.

Cast-in-situ piles have flexible reinforcement configuration, good mechanical performance, good seismic performance, and little impact on the environment, but the construction process is hidden, the process is complicated, the pile is prone to breakage, and the construction quality is difficult to control

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