Underwater guiding device and construction technology for large-cylinder vibration-sinking construction of lattice sheet piles

Abstract

The invention discloses an underwater guide device and construction technology for vibratory sinking construction of a large cylinder of lattice sheet piles. The outer diameter of the beam corresponds to the inner diameter of the large lattice sheet pile cylinder; the guide unit is set on the steel ring beam and contacts with the inner side of the lattice sheet pile large cylinder for guidance; the steel buoyancy box is set on the steel ring beam, controlled by buoyancy The position of the steel ring beam in the water; the limit device is set on the steel ring beam to limit the translation and rotation of the steel ring beam after it is positioned underwater; the lifting device is arranged on the steel ring beam to lift the steel ring beam out of the water. Based on the underwater guide device provided by the present invention, the deviation, verticality, deformation and other indicators of the steel sheet piles of vibrating sinking can be greatly improved, the construction efficiency is significantly improved, and the construction quality is greatly improved.

Description

technical field [0001] The invention relates to a grid-shaped steel sheet pile, in particular to a construction auxiliary device and a process for a grid-shaped steel sheet pile. Background technique [0002] see figure 1 , Lattice steel sheet pile refers to a component that is processed into a lock shape at both ends after hot rolling and other treatments in the factory. As a type of support structure, it has high strength, light weight, good water resistance, long service life, It has the advantages of high safety, low space requirement, and remarkable environmental protection effect. Lattice sheet pile large cylinder is a commonly used structural form for offshore artificial islands, piers, breakwaters, and bank revetments. The main body is a closed cylindrical pane made of dozens or hundreds of linear sheet piles, and the interior is filled with sand Composed of stone materials, it forms the vertical case wall. At the same time, the lattice sheet piles, together with t...

AI Technical Summary

Problems solved by technology

[0003] Lattice sheet piles are thin-walled structures, characterized by very small out-of-plane stiffness, and are prone to buckling deformation under the impact of a large-tonnage vibratory hammer. Difficult piles or less than the design elevation; on the other hand, it may cause damage to the steel sheet pile structure, which is not conducive to engineering safety

[0004] see figure 2 , the first step in the vibration-settling construction of the lattice sheet pile large cylinder is the sinking of the sheet pile under its own weight. When the sheet pile sinks under its own weight, due to the influence of wind, waves, currents, tides, etc., it is inevitable that the pile will be tilted or deformed when it is lowered. Pile loading will cause the following problems: ① Parts of the lattice sheet piles are tightened and partially tightened, which greatly increases the friction between the latches, making it difficult to sink the pile; ② When the lattice sheet pile is tilted, the vibration Under the action of the hammer, the force in the horizontal direction is generated, which easily deforms and destroys the steel sheet pile, and further increases the friction between the locks. After entering the hard soil layer, the resistance of the pile sinking increases greatly, making it impossible to vibrate the steel sheet pile. sink to the design elevation; ③When the steel sheet pile is tilted, it may also cause lateral vibration, resulting in the energy of the vibratory hammer not being fully utilized, and the construction efficiency is greatly reduced

[0006] According to the existing pile sinking technology and technological level, the verticality and free length of the sheet pile below the water surface are difficult to control

Images