A Calculation Method of Penetration of Pile Foundation

Abstract

The purpose of this application is to provide a calculation method for the penetration of a pile foundation, which includes the following steps: according to the obtained pile foundation hammering parameters and soil parameters, obtain the penetration of the pile foundation after hammering, and Compare the penetration with the preset penetration; when the penetration is greater than the preset penetration, the initial kinetic energy of the pile foundation after hammering is obtained according to the obtained pile foundation hammering parameters; according to the obtained soil parameters and the pile foundation parameters and initial kinetic energy to obtain the sinking distance of the pile foundation; when the sinking depth of the pile foundation reaches the pile sinking design depth, stop hammering, otherwise continue hammering; after stopping hammering, determine based on the penetration final penetration. Compared with the existing technology, the calculation accuracy of the final penetration can be improved, and the sinking depth and hammering times can be directly calculated to facilitate subsequent piling work.

Description

technical field [0001] The invention relates to the field of construction, in particular to a method for calculating the penetration of pile foundations. Background technique [0002] Pile foundation is a commonly used foundation structure in the construction field, and its construction index during construction and construction plays a vital role in the quality of the building structure on the foundation structure. [0003] Penetration, as an important evaluation index for the feasibility of pile sinking, refers to the depth of the pile foundation penetrating into the soil under one hammering, which can usually be estimated by hammering energy and soil resistance. Soil resistance refers to the reaction force provided by the foundation soil to the pile after the pile foundation penetrates into the soil layer to a certain depth. Since the soil resistance at different penetration depths is not necessarily the same, engineers can use the soil resistance generated by the pile fo...

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Problems solved by technology

[0012] From formulas (1.1) to (1.3), it can be seen that the existing Hayley formula has the following defects in the calculation: it does not consider the aspect ratio of the pile foundation, the change of soil layer parameters during the penetration process, etc. The impact of factors on the calculation of the final penetration of the pile foundation affects the estimation accuracy of the penetration depth and bearing capacity of a single pile, and the sinking depth and corresponding hammering times cannot be directly calculated, and the calculation efficiency is low

In addition, in the method of measuring the corresponding parameters through the force sensor and the acceleration sensor and calculating the final penetration of the pile foundation through the calculus formula, field testing is required, which greatly wastes time and increases testing costs, and is prone to failure. The phenomenon of wasting pile foundation materials

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