Pile pressing perpendicularity control injection device for pile foundation centrifugal test

Abstract

The invention discloses a pile pressing perpendicularity control injection device for a pile foundation centrifugal test. The device comprises a model pile, a loading injection system, a perpendicularity control system and a centrifugal machine model box, wherein the perpendicularity control system comprises a fixed upper plate and a fixed lower plate which are arranged in parallel and are both annular plates, the model pile is located at the circle centers of the annular plates, four guide grooves are formed in the fixed upper plate in the radial direction, the same guide grooves are formed in the positions, corresponding to the fixed upper plate, of the fixed lower plate and used for restraining guide plates, the upper ends and the lower ends of the guide plates are both located in the guide grooves and can move in the guide grooves in the radial direction, and therefore the installation requirements of different pile diameters are met. By means of the device, a pile foundation can be injected into a seabed soil body, the device can be suitable for pressing piles with different pile diameters into soil by changing the distance between the guide plates, the pile pressing perpendicularity is guaranteed in the injection process, and therefore, the later-period experimental testing requirement is met.

Description

technical field [0001] The invention belongs to the technical field of centrifugal tests, and in particular relates to a penetrating device for controlling verticality of piles used in centrifugal tests of pile foundations. Through this device, the pile foundation can be penetrated into the seabed soil, and the distance between the guide plates can be changed to suit the pressure piles of different pile diameters, and the verticality of the pressure piles can be ensured during the penetration process to meet the later test and test Require. Background technique [0002] As an important foundation type, offshore pile foundation is installed on the surface of the seabed by driving or static pressure penetration to support the upper structure, such as offshore wind turbines, fixed offshore oil and gas platforms, etc. At present, this foundation type occupies an important position in the foundation form of shallow ocean structures. [0003] In order to explore the bearing capa...

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Problems solved by technology

[0004] However, in the centrifugal model test, the pile needs to be statically installed into the seabed soil at first. At present, the jack is usually used to press in directly. Experimental error, even if there are some devices that can control its verticality, it cannot be applied to the situation of different pile diameters

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