The Boundary Element Method for Pile-Soil Interaction

In this paper, several mathmatical models for the pile- soil interaction are outlined. The Boundary Element Method is one of the very effective methods for the reasonable models of elasticity and elastoplasticity. The major of this paper is concerned with the Boundary Element Method for the pile-soil interaction, including general methods and calculating formulation of static and dynamic analysis of the pile and pile groups. Some results of analysis are also given.

非均相类芬顿催化剂Fe/SBA-15的制备及其催化性能的研究

采用浸渍法制备了负载型Fe/SBA-15催化剂,其与H2O2可构成非均相类芬顿催化剂,采用XRD、N2吸附-脱附分析、IR和TEM等手段对Fe/SBA-15催化剂进行表征。通过降解水中的亚甲基蓝研究催化剂的降解性能,考察催化剂中Fe含量、H2O2初始浓度和溶液初始pH等因素对亚甲基蓝降解率的影响。实验结果表明,Fe/SBA-15催化剂具有介孔结构,孔道均匀,平均孔径为5.534 nm,比表面积为483.5 m2/g;在溶液初始pH=3、H2O2初始浓度20 mmol/L、亚甲基蓝初始浓度2.5 mmol/L,Fe含量为0.9%(w)的Fe/SBA-15催化剂2 g/L、17.5℃和90 min的条件下,亚甲蓝的降解率可达到96.36%;Fe/SBA-15催化剂连续重复使用3次仍具有良好的催化性能。