Method for estimating value of proportionality coefficient m of horizontal resistance coefficient of foundation

The invention discloses a method for estimating a proportionality coefficient m value of a horizontal resistance coefficient of a foundation. The method comprises the following steps: determining basic parameters of a pile foundation and basic parameters of a soil layer; establishing a calculation expression of a foundation horizontal resistance coefficient proportionality coefficient m value; giving an initial value of a foundation horizontal resistance coefficient proportionality coefficient m value; calculating a pile top horizontal displacement dimensionless coefficient and a pile top horizontal deformation coefficient; a data set of the depth along the pile body under the ground and the corresponding horizontal displacement is obtained; determining the first zero point depth l0 of the deflection line and the horizontal displacement xz1 at the depth z1 = l0/2; z1 and xz1 are substituted into a calculation expression, and a calculation value of m is obtained and recorded as mc1; performing error analysis o