关键词: Melan解, 边界条件, 弹性地基法, 基床系数, 应力路径, 深基坑

Abstract:

Due to the characters of clear physical meaning and simpleness, elastic foundation method is applied to deep foundation pit design widely. The key factor of this method is choosing horizontal coefficients of subgrade reaction reasonably. Based on Melan’s solution and integral boundary confirming, analytical method of horizontal coefficients of subgrade reaction of strip foundation pit is gained. According to the results of stress path test, the stress path modulus and horizontal coefficients of subgrade reaction of sandy silt in Hangzhou are gained. Compared with the measured results of deep foundation pit of Hangzhou Metro Line No1. testing section, the results of this method are validated; and it is shown that this method can be applied to the following deep foundation pit design in Hangzhou. Compared with traditional elastic foundation method, horizontal coefficients of subgrade reaction of this method are more specific. Compared with continuous medium finite element method, this method is simpler, in parameters, convenient in calculation and clear in conception.

Key words: Melan’s solution, boundary condition, elastic foundation method, coefficients of subgrade reaction, stress path, deep foundation pit Melan’s solution, boundary condition, elastic foundation method, coefficients of subgrade reaction, stress path, deep foundation pit Melan’s solution, boundary condition, elastic foundation method, coefficients of subgrade reaction, stress path, deep foundation pit Melan’s solution, boundary condition, elastic foundation method, coefficients of subgrade reaction, stress path, deep foundation pit