Cast-in-place bored energy pile with novel pipe layout mode and construction method thereof

Abstract

The invention belongs to the technical field of civil construction engineering, and particularly discloses a cast-in-place bored energy pile with a novel pipe layout mode and a construction method thereof. The cast-in-place bored energy pile comprises a cast-in-place pile body, a heat transfer pipe arranged in the cast-in-place pile body, a water pump communicating with an inlet of the heat transfer pipe, and a heat collector communicating with an outlet of the heat transfer pipe; the water pump and the heat collector communicate with a heat exchange structure; the cast-in-place pile body is formed by lowering and welding a plurality of reinforcement cages in sections, each reinforcement cage is composed of a top reinforcement cage section, a bottom reinforcement cage section and a middlereinforcement cage section, and reinforcement loop rings are welded to the top and the bottom of each reinforcement cage section; and the heat transfer pipe penetrates through the reinforcement loop rings to be bound to the reinforcement cages, and the heat transfer pipe leads to the heat collector after passing through the water pump and the heat exchange structure. The cast-in-place bored energypile has the advantages that the structure is simple and construction is convenient and fast.

Description

technical field [0001] The invention belongs to the technical field of civil construction engineering, and in particular relates to a new type of pipe-laying bored grouting energy pile and a construction method thereof. Background technique [0002] Shallow geothermal energy is a clean and sustainable energy source with low cost, convenient use, and most importantly, a wide range of distribution. Heat exchange: It can be used for heating in winter; it can be used for cooling or cooling in summer. At present, the use of energy piles stays in small and medium-sized projects, and the use of large and extra-large projects is seldom. [0003] Cast-in-situ piles are of great significance for energy piles to be used in large-scale projects. At present, large-diameter cast-in-place energy piles have not been popularized and applied mainly because of the complicated construction process, the difficulty in arranging the heat transfer tubes when the steel cage is lowered in sections, a...

AI Technical Summary

Problems solved by technology

[0003] Cast-in-situ piles are of great significance for energy piles to be used in large-scale projects. At present, large-diameter cast-in-place energy piles have not been popularized and applied mainly because of the complicated construction process, the difficulty in arranging the heat transfer tubes when the steel cage is lowered in sections, and the heat transfer tubes are prone to being welded or concrete. Catheter damage, unstable quality and other factors, therefore, how to solve the above problems and select the most suitable way of piping is an urgent problem to be solved by the majority of scientific research and technical personnel

The patent document with the application number 201820023683.6 discloses a ground source heat pump energy pile. This method sets circular pipe sections connected up and down, innovates the branching of the heat exchange pipes, improves the heat exchange efficiency, and decomposes the heat exchange pipes in the axial direction. The stress received avoids that after the load is applied to the top of the pile, the heat exchange pipe in the pile will be deformed or even broken due to the large stress. However, the heat exchange pipe in this method needs to be rebuilt, which is expensive and the quality is not guaranteed; the application number is CN201710294328. 2 patent discloses a heat exchange system and construction technology based on deep buried pipes and energy piles. Although this method overcomes the traditional buried pipe ground source heat pump system occupying underground space and the energy piles are buried shallowly and have limited heat transfer. The disadvantage is to improve the utilization rate of geothermal clean energy, but the heat exchange tube embedded in the pile is too short to make full use of geothermal resources, and the survival rate of the heat exchange tube is low, etc.

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