地基沉降计算方法的研究与改进

针对现行经验系数包含的影响因素太多以致其取值过于离散的问题,在现行规范法计算建筑地基沉降的基础上,对现行方法进行了改进,由原来的1个修正系数改为4个修正系数,用新增加的3个系数反映3个不同方面的影响,以减小原经验系数的综合程度.分别考虑基础刚度、侧限假定及取土扰动对新引进的3个修正系数进行取值,并提出了相应的确定方法.实测工程的计算分析表明,改进后的计算方法准确性大为提高.

Study and Improvement on Method of Foundation Settlement Calculation

The current coefficientΨ_s of correction includes many influencing factors.And numerical value of this coefficient varies widely.So the current method was improved from one coefficient to four coefficients in this paper.Three new coefficients of correction were considered to decrease composite ratio of coefficientΨ_s and put forward three coefficients to modify calculating result.Foundation stiffness,lateral confinement assumption and soil turbulence were considered to get the value and method of the three coefficients. Consequently this study improves accuracy of numerical value of the coefficients.