Novel foundation design method

Abstract

The invention discloses a novel foundation design method. The method comprises the following steps of: establishing a novel settlement calculation method according to a P-S curve of an in-site soil plate loading test; when the P-S curve of the plate loading test is supposed as a hyperbolic equation, establishing a hyperbolic model method; resolving the tangent modulus and the secant modulus of a soil body; applying the resolved modulus to a layering summation method for settlement calculation of a foundation and a pile foundation; establishing a hyperbolic tangent and secant modulus method of in-situ soil; and establishing the relation between the tangent modulus of the soil body and a load level so as to form a novel nonlinear foundation total settlement process calculation method which uses the tangent and secant modulus method of in-situ soil. In a determined soil body deformation parameter, the original property and non-linearity of foundation soil can be well considered, so that the nonlinear settlement process of the foundation can be calculated correctly; simultaneously, the number of needed soil body parameters is small, so that the method is convenient to apply and an optimal state of replenishing appropriately during foundation design is realized.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, in particular to a new foundation design method based on tangent modulus. Background technique [0002] The traditional foundation design method directly uses a hyperbola to represent the nonlinear settlement calculation method of the foundation soil, which has certain limitations for the application of the common layered foundation soil, and is not complete enough for the foundation with a limited depth of the compression layer. Currently, the most commonly used method in engineering The settlement calculation method is the stratified sum method. The characteristic of the layered sum method is that it is simple, but the disadvantage is that the error is large. Its calculation result is too large for hard soil and small for soft soil, so it needs to be corrected by empirical coefficients. The main reason for the large error is that the parameters of the soil fail to reflect the nonline...

AI Technical Summary

Problems solved by technology

However, the settlement process of the real foundation is nonlinear. Therefore, it is obviously impossible to simulate the settlement calculation of the whole process of the foundation up to the limit state with only a single deformation modulus.

Therefore, the accuracy of foundation settlement calculation is mainly affected by the reasonable determination of soil parameters and the deformation characteristics of soil. How to use undisturbed soil mechanics parameters or use undisturbed soil tests for foundation design is a very meaningful but still incomplete. solved problem

At the same time, in the existing pile-soil composite foundation design method for foundation treatment design, the load distribution of piles and soil does not consider the nonlinear settlement of piles and soil and the influence of its distribution results, so the design cannot fully utilize the foundation. and pile bearing capacity

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