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新规范（ＧＢＪ７—８９）对老规范（ＴＪ７—７４）用作计算地基沉降的Ｅｓ值有了较大的修改，ＧＢＪ７—８９规范则要按实际应力范围取值，即以土的压缩系数α＝（ｅ１一ｅ２）／（Ｐ２一Ｐ１）代替ＴＪ７—７４规范土的压缩系数ａ１－２＝（ｅ１一ｅ２）／（２－１），本文分别对新老规范用作计算沉降的参数Ｅｓ值分别作了分析比较。
The new specification (GBJ7-89) has been greatly modified from the old code (TJ7-74) used to calculate the settlement value of the foundation. The GBJ7-89 specification is based on the actual stress range, ie the compression coefficient α of the soil. = (e1 - e2)/(P2 - P1) instead of TJ7—74 soil compressibility coefficient a1-2 = (e1 - e2)/(2-1). This paper uses the new and old codes as the parameter for calculating settlement. Values were analyzed and compared.