土力学0(国外英文资料).docVIP

土力学0(国外英文资料) One: soil compaction and subsidence will not be completed in a short time, so it is associated with time. The stress history of earth refers to the stress state in the history of the earth, and the stress state changes. If the soil stress history have been bigger pressure, later, the pressure decreasing for some reason, building on the soil, the soil is in unloading state of compression, the compression will be relatively reduced. For most natural soil, because of a long geological time, under the weight of consolidation has been finished, the consolidation stress change, no longer is no longer cause the soil compression, only the outer loads caused by additional stress can further make the soil compression. 2: the upper structure, through the base into a first contact stress, the effect of the ground, and generate additional stress and consolidation through the water in the hole and grain, drainage and exhaust in the process of consolidation, the additional stress into effective stress. Three: stratified summation method: approximate as each stress along the thickness of layered soil in uniform and evenly distributed, the idea is according to the condition of natural foundation layer, determine the scope of compressible stratum, and the formula to calculate each layer by the unidirectional compression compression capacity, and accumulative total settlement. Its steps: calculate the base pressure and distribution according to the properties of the load on the base. Stratification of the foundation; Calculating the distribution of self-weighted stress in the foundation; The distribution of vertical additional stress in the foundation; Average self-weighted stress and average additional stress on average. The ith layer compression; The total amount of sedimentation of the foundation is obtained by the accumulation of various layers. Foundation specification recommended method: on the basis of the layered summation method, a large number of construction p