Knowledge

Dec 30, 2019

Causes and Solutions for Pile Body Fracture during Sheet Pile Driver Construction

During the construction process of a sheet pile driver, the pile body suddenly tilted and was misplaced, while the pile hammer bounced up, causing the pile body to recoil and stop construction. There are many reasons for the file body to fracture during the construction of the sheet pile driver. 1. If you hit relatively hard ground or an obstacle, the pile body will not be able to withstand bending strength and will break. If verticality is insufficient, recalibrate after driving to a certain depth; when the pile body bends or drills, the verticality becomes too great, sinking along the deviated verticality during the sinking process, causing the pile body to bend; 3. If the length is insufficient, using multiple sections of piles for construction. Two connected piles not welded on the same axis will bend and twist. The pile body bears tensile stress; when the tensile stress exceeds the load, lateral fractures occur inside the pile body. 5. There are many fragments in the sand and stones, and the strength of the pile body is not enough. 6. Due to insufficient concrete strength of the pile body or other reasons (such as the softness and uneven stiffness of some parts of the pile body), the bending strength may tilt.


Now that you know why, you can avoid fractures, but what if the pile breaks? Before the construction of the sheet pile driver, please clear the obstacles first and check the quality of the file body. The slenderness ratio of the sectional file should not exceed 30. Do not use a bent file body. If it is not vertical, correct it in time. If severe tilting occurs, it will work strictly according to your requirements to ensure that the two files are on the same axis. Adopt the "filing method" to control the vertical deviation within 1%. To prevent the pile body from bending, operate the pile body according to relevant regulations during transportation and storage, and never use a cracked file. If the geological conditions are complex, the geological exploration holes can be densified, and effective measures taken. During the construction process of the pile driver, never damage the file body and make it awkward; the corresponding file recovery method should be adopted according to the geological conditions, the position and structure of the file body, etc. Piling up on both sides of the fractured pile can symmetrically stack the group of column foundation piles on the outside or top of the cover.

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