Structural design and construction method of a prefabricated energy pile

Abstract

The invention provides a structural design and construction method of a prefabricated energy pile, which belongs to the field of geotechnical engineering foundation engineering. The main feature of the prefabricated energy pile is that the reinforcement cage of the prefabricated pile adopts hollow longitudinal steel bars and spiral stirrups, and the heat-carrying anti-corrosion fluid flows from the reinforcement cage system. The reinforcement cage system not only bears the upper load with the concrete of the pile body, but also realizes the heat exchange between the upper structure and the underground rock-soil body, realizing a dual-purpose pile, which is also conducive to reducing the cost of energy piles. Prefabricated energy piles are produced in a factory, which is convenient for quality control. At the same time, this patent combines cement mixing pile technology and static pressure pile technology and applies it to the construction of energy piles. On the one hand, it ensures the quality of energy pile driving and insertion, reduces damage during pile foundation driving, and improves the energy pile. carrying capacity. At the same time, the energy pile is in close contact with the surrounding soil, ensuring the heat exchange efficiency between the energy pile and rock and soil. The structural design and construction method of the prefabricated energy pile proposed in this patent is conducive to the promotion and application of the energy pile.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering foundation engineering, and specifically relates to a structural design and construction method of a prefabricated energy pile. Background technique [0002] my country's total building energy consumption accounts for more than 25% of the social terminal energy consumption, of which heating and air conditioning energy consumption accounts for more than 50% of the total building energy consumption. Therefore, building energy conservation is an urgent task for the sustainable development of my country's economic society. Ground source heat pump technology utilizes renewable shallow heat energy to heat and cool buildings and provide domestic water through heat pump units. It can be widely used in public buildings, residences, schools, hospitals and other buildings. The principle of ground source heat pump technology is: in winter, the ground source heat pump extracts low-level heat from the gr...

AI Technical Summary

Problems solved by technology

The research results show that reinforced concrete piles have large heat storage capacity and good heat transfer performance, and are the most widely used in the world, but there are also complex construction procedures, difficult quality control and relatively high cost and other issues; prefabricated piles are rarely used because they may cause damage to the heat transfer system during pile transportation and driving.

The above problems restrict the promotion and application of energy piles to a certain extent. This patent designs a prefabricated energy pile structure design and construction method. This patent further integrates energy piles and heat exchange systems. Hollow longitudinal steel bars and spiral stirrups are used in the center, and the heat-carrying anti-corrosion fluid flows from the steel cage system to achieve heat exchange

Images