On-site construction system and method of pile foundation based on 3D printing

Abstract

The invention discloses a pile foundation site construction system and method based on 3D (three dimensional) printing, the system comprises a feeding unit, a driving control unit, a hoisting guiding unit, a printing unit and a pile sinking unit. The construction system and method have the advantages that the superiority of a 3D printing technology can be displayed, are applicable to field fabrication and field construction of an ordinary pile foundation and a special pile foundation; not only can the uniform quality advantage of a precast pile body be reserved, but also can be fabricated and constructed on site directly like a filling pile, no template is needed, no carriage is needed, and except for saving material, resistance force of side friction of the pile body can be remarkably strengthened, construction requirements of the special pile foundation on section form and internal structure and the like can be met precisely.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering and relates to pile foundation construction technology, in particular to an on-site 3D printing system and method for pile foundations. Background technique [0002] 3D printing is a new type of rapid additive manufacturing technology. It can accurately print out the entity with electronic blueprints and consumables. It has the advantages of fast forming, low pollution, material saving and high product quality. At present, the development of this technology in the field of construction engineering is becoming more and more mature. Although it has not been industrialized, it has been able to independently print out low-rise building entities on the existing basis. [0003] According to the construction method, the pile foundation can be divided into two categories: cast-in-situ pile and prefabricated pile. Among them, cast-in-place piles need to form pile holes in the foundation soil in adv...

AI Technical Summary

Problems solved by technology

In this process, due to the complexity and uncertainty of underground soil conditions, the quality of cast-in-situ piles is difficult to control, and quality problems such as broken piles, necking, empty soil at the bottom of the hole, or thick sediment are often prone to occur. For cast-in-situ piles (such as X-shaped piles, large-diameter pipe piles, etc.), molds are generally required, and when the mold is pulled out, the quality of the pile body is even more difficult to control; Due to the uncertainty of the design depth and the limitations of transportation and hoisting, the length of the pile is relatively fixed (6~12m), and it is often necessary to connect and cut piles during construction, which is time-consuming and laborious, and will cause unnecessary waste of materials

In addition, for some special pile foundations (such as energy piles, etc.)

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