For roller compacted concrete (RCC in abbreviation) with the admixtures of limestone powder and water quenched iron slag in dam of Jinghong hydropower station located at the downstream of Lancang River in Yunnan province, the raw materials and mix proportion of the RCC with limestone powder and water quenched iron slag admixtures were studied by materials testing and X-ray diffraction analysis method. Then the mechanical properties, thermal properties, deformation properties and the durability of this RCC were also analyzed by experimental methods. The elastic modulus and creep degree of this RCC were studied specially by the method of experiment and nolinear fitting. The study results show it was theoretically feasible that adopting the double admixtures as the admixture of the mass hydraulic concrete which can be roller compacted concrete. And the properties of this RCC in Jinghong hydropower station meet all kind requirements.

In this paper, based on the experimental measured cooling curves, it was solved that the inverse problem of non-linear heat conduct equation for Steel 1045 quenched by water using finite difference method and nonlinear estimate method. The volume fraction of constituent of austenite, pearlite, bainite, martensite and the non-linear surface heat-transfer coefficients in continuous cooling during quenching were calculated and simulated by mathematical transformation. The volume fraction of phase constituents in the quenched work piece of 1045 steel was tested subsequently. Then the temperature field and thermal stress field of Steel 1045 cylinder during water quenching was simulated by ANSYS. The study results show that the 2D transient temperature field of the cylinder specimen calculated by ANSYS during quenching coincides with the practical quenching process, and the results of thermal stress field simulated by ANSYS can guide quenching process.

This study simulated the condition of below-wall raft foundation supported masonry structure perpendicularly penetrated by shallow-buried and mining tunnelling using 3D MIDAS/GTS software with consideration of the coaction of structure, ground and tunnel. The load and deformation patterns of structure before and after the penetration of tunnelling excavation face were evaluated. Results from the study showed that: when the horizontal distance between the central axis of the structure and the axis of the tunnelL=0 m, the settlement of the structure increased before and after the penetration of tunnel through the masonry structure, and the settlement became stable after the tunnel passed through a certain distance (approximately 2.4 times of the thickness of ground cover); the structure settled overall and the difference of settlement was relatively small; the maximum first principal stressP1and the maximum deformation rateE1showed an overall increasing trend. With the increase ofLfrom 0, inclination of the structure towards the tunnel was witnessed, the settlement of foundation appeared to be linearly distributed and the inclination rate of foundation first increased then reduced;P1showed a decreasing trend andE1first reduced, then increased and decreased again.

The finite element analysis model of Zhuziqing tailings pond is established by using the finite element method (FEM) analysis software ANSYS based on hydrological conditions, engineering geological conditions, tailings silt dynamic triaxial test results and the foundation rock-soil wave velocity tests results. Then it was studied that the dynamic characteristics and dynamic response of Zhuziqing tailings dam under seismic loads. Results show that dynamic shear modulus of tailings silt increase as dynamic shear strain decreasing and increase as the increasing of confining pressure or consolidation ratio under the condition of isotropic or anisotropic consolidation. But the variation law on damping ratio of tailings silt is just opposite to that of dynamic shear modulus. Results also show that under the dynamic peak acceleration 0.2g of seismic wave, response acceleration of Zhuziqing tailings embankment reached the peak at the time of 2.58s, and the response peak acceleration is 5.24m/s2 at the top of this tailings embankment.

Using finite element method, models of different element mesh density for the center hole in flat plate were established according to one actual steel plate with central circular hole. The stress concentration coefficients of these models were calculated by means of numerical method. Then the calculated results were compared with the theoretical solution results of Elastic Mechanics. And it was analyzed subsequently that the influences which were caused by different element mesh density on the stress concentration coefficients around the hole in flat plate. The relationship between the element mesh density and the stress concentration coefficients around the hole in flat plate was proposed finally. Results show that the element mesh density for calculation affects the stress concentration coefficients around the hole in flat plate significantly, but the influence is few when the mesh density increases to a certain extent.