The simulating results indicate that,with the reduction of D and the increase of H,the circumferential stresses of steel spiral case and surrounding concrete show increasing trend,the bearing ration of steel spiral case also increases,while the width and extent of cracks both reduce.
Through the 3D finite element method, a static and dynamic analysis, including the stress distribution rules, load bearing ratio of the outer reinforced concrete and the natural vibration mode, has been performed on three structural patterns of the spiral case of a hydropower plant.
Aimed to address the expansive soil problem in highway construction in the centre of Anhui Province,typical soil specimens from the He-Liu-Ye expressway are chosen to carry out systematically experiments to study the characteristics of California Bearing Ratio(CBR) of expansive soils,and based on this the usability of expansive soils as subgrade materials is discussed.
Taking the road foundation of Airbus A320 general assembly line supporting projects as the object of study, some tests including compaction test, indoor unconfined compressive strength test, CBR bearing ratio and modulus of resilience test have been completed. Then, the author has discussed its influences to soil strength and water stability.
A Tertiary clay was subjected to California Bearing Ratio testing and repeated load testing.
The clay mineralogical assemblage, major elements geochemistry and strength characteristics in terms of the California Bearing Ratio (CBR) of three genetically different residual soils in Southwestern Nigeria were investigated.
The results of the investigations show that the subgrade soils below the stable sections have a higher maximum dry density, unsoaked California bearing ratio (CBR) and uncured, unconfined compressive strength than those below unstable sections.
Both histogram and bearing ratio curve can be used to separate the levels in multilevel surfaces.
In addition, the paper also documents the use of finite element analyses techniques to determine the California Bearing Ratio.