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一、湿陷起始压力值确定方法中存在的问题我国《湿陷性黄土地区建筑规范》TJ25-78(以下简称《78规范》)中规定,湿陷起始压力可按载荷试验和室内压缩试验的双线法或单线法确定。同时规定采用室内压缩试验时,可取一定的δ_s值对应于p-S_s曲线上的压力作为湿陷起始压力值。δ_s值通常在0.01～0.02之间,其具体数值可根据曲线形
I. Problems existing in the method for determining the initial value of the collapsible depression The regulations in the “Construction Rules for Collapsible Loess Areas” TJ25-78 (hereinafter referred to as “the 78 Code”) stipulate that the initial pressure of collapsible depression can be tested according to the load test and the internal compression. The test is determined by the two-wire method or the single-line method. At the same time, when the indoor compression test is specified, it is preferable that a certain δ_s value corresponds to the pressure on the p-S_s curve as the collapse initial pressure value. The δ_s value is usually between 0.01 and 0.02. The specific value can be based on the curve shape.