It makes decision on stability state of countryrock according to in - situ surveying datum , and grey prediction model is formed using the deformation curve of country rock . this model can predict latter displacement of country rock . deeper analysis is also been counducted on countermeasure and mechanism of softrock tunnel , and gradation analysis method is applied to select the optimum bracing plan
12.
Based on the above experiments , the 18 rpc filled circular steel tube were completed , which has yielded some positive fruits : 1 . this paper collects the test data on the stain deformation and ultimate loading capacity , describe the change of figure and the failure patterns of the specimens , and analyze the characteristic of it ' s load - deformation curve and the all course of work
13.
On basis of experimental analysis , several conclusions can be indicated that : roughness of cement face or structural plane can be described well quantitatively with fractal dimension in paper . roughness increases inner friction angle and cohesive force , and transfers characteristics of shear deformation curve and mechanics and form of shear failure
14.
Abstract : through statistical analysis of the rock mechanic properties of upper jurassic and cretaceous red mudstones , siltstones and sandstones in the middle sichuan red basin , the range of their compressive strength , the features of the shearing strength and of the deformation curves are proposed in this paper
15.
Based on tests of nine 1 / 2 - scaled model slabs under vertical loads , the paper analyzed load - deformation curve and proposed limit value of height - width ratio under axial loads . 2 . based on aseismic tests , the paper put forward a model of concrete frame , silica brick and a combination of the two , proposed that the silica brick works as a 45 compression bar , analyzed the factors which may influence bearing capacity of the slab and advised a formula including the numbers of bays and of storeys of the frame
