Advanced Materials Research Vols. 1030-1032

Abstract: This article discussed the applicability of the curing agent, the growth and change of the peat soil curing unconfined compressive strength and under the different variables (such as cement, curing agent formula, construction waste, age). We get the strength increase model by analyzing the results of peat soil solidification formula experiment. Regress equation about the cement dosage, curing agent, content of construction waste residue, age and principal component values was built by using the regression analysis.

Abstract: Using ANSYS finite element simulation L plate that existing in the structural engineering,stress analysis was carried out on the plate, comparing the result with other two rectangular plate model which outer contour of the same size, and draw relevant conclusions.

Abstract: Red bare soil is a kind of soil remained on plateau from ancient ages. Researchs toward better understanding of the relationship between stability of surface aggregate and SOM (Soil Organic Matter) based on 14 typical samples indicate that red bare soil clay (<0.002mm) contents between 12.18% and 64.02% which belongs to poor cultivation performance soil. The number of macro-soil aggregates after dry sieving were far more than the number after wet sieving. Water-stable aggregate content (WSAC) informed the feature of red bare soil. The WSAC were between 28.77% ~ 52.87% at the size >0.25mm and the aggregates destruction rate (PAD_0.25) were 34.28% to 68.10%, mean weight diameter (MWD) were at the size of 0.53 to 1mm, geometric mean diameter (GMD) were between 0.37 and 0.58mm, fractal dimension (FD) were between 2.79 and 2.92. The 5 index above indicated the structural stability, anti erodibility and physical property were both poor when compared with other typical soil samples in southwest karst area of China. The research also indicated that soil organic matter (SOM) and WSAC has more effect than mechanical aggregate. SOM has significant positive correlation with MWD and GMD, and significant negative correlation with PAD_0.25 and FD. Lack of SOM and exposed led to soil structure stability deterioration. These can be the reason why soil erosion seriously and can’t grow vegetation in red bare soil area.

Abstract: Based on the experimental materials including waste-rocks and tailings are provided by a certain iron mine, designed orthogonal test about the strength of cemented filling body, got 42 groups and 126 dates in total. The results indicate that negative power exponent relationship is showed between the compressive strength and water-cement ratio; meanwhile, the relationship conforms to Arioglu prediction model. The fitting equation is of great significance as well as high precision in fitting results. It also indicates that the model has some applicability and reliability for predicting the strength of cementing filling body, and can be used to preliminary estimate the engineering design parameters in actual filling.

Abstract: In view of the limitation that happens when the adhesion between SBS modified asphalt and aggregated rock is evaluated by water-boiling method, on the basis of adhesion mechanism analysis of asphalt and aggregated rock, we design the evaluation method of the adhesion between asphalt and aggregated rock based on shear test, advance the quantitative index to evaluate the adhesion——shear strength, and validate the feasibility of shear strength index, analyze how the type and dosage of SBS modifier and the temperature of test influence the adhesive effect of SBS modified asphalt and aggregated rock. Result shows that The incorporation of SBS significantly improve the adhesion of asphalt and stone , especially the effect of star-modified asphalt and with the increase of dosage of SBS ,the adhension of asphalt and stone significantly increased, the shear strength of SBS modified asphalt and stone is increased about 100% than matrix asphalt when the dosage is 4%. It also describes that the shear strength index can quantitatively evaluate the effect of asphalt binder and aggregates to provide a reference for performance evaluation and quality control of modified asphalt .

Abstract: Describe the situation of the development of the helicopter. For national conditions, narrate the development status of the civil helicopter in our country, and analysis its main effects of the helicopter. Then put forward the effects of the civil helicopter by the vibration and voice, and research the vibration and voice of the civil helicopter from the perspective of man-machine-environment system (MMES), consider the main effects, and give the effect model.

Abstract: The paper uses saturated - unsaturated seepage calculation of FEM, analyzes the seepage numerical of hongze lake dike reinforced by high-pressure Sway-sprinkle technology, provides seepage load for stress and deformation and stability calculation of the dike engineering, evaluates the anti-seepage effect of high-pressure sway-sprinkle cutoff wall. The results show that it reduced invasion of the embankment surface and decreased seepage velocity and flow, high-pressure sway-sprinkle cutoff wall took good effects and greatly improved the overall stability and safety of hongze lake dike.

Abstract: This paper summarized the current research situation and development direction of the storey adding structure all over the country. On the basis of the situation, combined characteristics of light steel storey adding structure, the article analyzed adding structure's damping distribution regularity. Based on the complex damping theory, through the mode-superposition method, there was established the correction formula of the earthquake response spectrum of light steel storey adding structure considered the effects of damping. All above, the article provides the basis for the study on the dynamic properties of light steel storey adding structure.

Abstract: The structural stress analysis of concrete chimney is the basic security to ensure the safe operation. The Simulation analysis of fine modeling based on large finite element method can make the calculating result more real and reliable. Combined with some chimney project, the fine structural model is established, and stress and internal force’s distribution in different load conditions is analyzed in this paper, and results show that the condition of the worst internal forces should be chosed according to the calculation object. The analysis method based on the finite element can be a reference for other similar chimney.

Abstract: In this paper,we study the strength and compression characteristics of ferrous sulfate erosion laterite at different concentrations and different curing time effects. The results prove, When lower concentrations of ferrous sulfate and shorter curing time,the shear strength and compression modulus of laterite appear maximum, the compression coefficient appears least; With increasing concentration and prolonging curing time, shear strength and compression modulus of laterite decreases,compression coefficient increases.