真空预压加固地基等效固结理论计算分析

摘 要：目前PVD地基固结解析解求解过程复杂且参数繁多。利用平均固结度等效概念，并考虑井阻和涂抹效应，将PVD地基等效为天然地基，针对真空预压特点，考虑了地表孔压随抽真空过程的变化，求出其一维固结解析解。根据所给出解，编制了程序，绘制了涂抹作用和PVD排水量对固结影响曲线图，并与有限单元法及现场实测数据进行对比。研究表明，所给出解与现有解、有限单元法和实测数据比较接近，且表达形式较为简单，适合于工程应用。     

论二铰板桥梁的连续固结加固法

从二铰板的力学性能着手分析了上世纪70年代所修建的二铰板桥的破坏机理,提出采用原结构转换为连续板结构的加固设计方法,并指出了连续固结法加固的优越性。     

Memory formation and the regulation of gene expression

On a cellular level, formation of memory is based on a selective change in synaptic efficacy that is both fast and, in case of important information, long-lasting. Rapidity of cellular changes is achieved by modifying preexisting synaptic molecules (receptors, ion channels), which instantaneously alters the efficacy of synaptic transmission. Endurance, that is the formation of long-term memory (LTM), is based on transient and perhaps also long-lasting changes in protein synthesis. A number of different methods exist to interfere with the synthesis of specific proteins or proteins in general. Other methods, in turn, help to identify proteins whose synthesis is changed following learning. These mostly molecular methods are briefly described in the present review. Their successful application in a variety of memory paradigms in invertebrates and vertebrates is illustrated. The data support the importance of selective changes in gene expression for LTM. Proteins newly synthesized during memory consolidation are likely to contribute to restructuring processes at the synapse, altering the efficiency of transmission beyond the scope of STM. Increased or, less often, decreased synthesis of proteins appears during specific time windows following learning. Recent evidence supports older data suggesting that two or even more waves of protein synthesis exist during the consolidation period. It is expected that the new molecular methods will help to identify and characterize molecules whose expression changes during LTM formation even in complex vertebrate learning paradigms.     

上海软土盾构法隧道的理论和实践

总结了上海软土盾构法隧道建设中的经验和教训，针对设计和施工中存在的地面沉降、衬砌防水、蛇行及盾构进出工作井的地基处理等技术难题，进行了多方面的现场监测，并与理论计算加以对比分析     

浅谈强夯法加固湿陷性黄土地基

本文以施工实践为基础，对湿陷性黄土地基采用强夯加固的有关问题进行了探讨。     

农村建设用地整理与社会主义新农村建设——以苏州吴中区农村为例

社会主义新农村建设是一项“系统工程”,它与农村建设用地整理政策密切相关,整理好农村建设用地可以提高土地利用的节约化、集约化程度,增加农民收入,改善农村生活和工作环境,促进城乡一体化协调发展．因此,社会主义新农村建设要从规划制定、资金投入、制度创新等方面对建设用地整理进行适当安排,以使社会主义新农村建设取得良好效果．     

浅谈强夯法地基处理

本文对强夯法加固地基的一些问题进行了探讨,包括有效加固深度,夯击能量级别,夯点位置,合理间距及夯击遍数的确定,控制参数的选用,地基承载力的计算,计算公式的验证等。     

因地基沉降引起的墙体开裂分析及加固处理

对住宅楼墙体和楼面的裂缝情况进行调查分析,指出地基产生不均匀沉降是其开裂的主要原因,并提出了实用的加固方案。     

加大截面法加固钢筋混凝土梁的简化计算法

给出了利用加大截面法对钢筋混凝土梁进行加固设计的一种简化计算方法。     

中低温油水井固砂剂实验研究

研究了树脂型固砂剂在中低温油水井中的固砂效果。评价了固化时间、固化温度、催化剂的类型和用量以及不同粒径石英砂等因素对固砂效果的影响。测定了砂岩岩心注固砂剂前、后渗透率的变化及开始出砂时的临界流量Qc,利用测定结果评价了固砂剂对地层渗透率的伤害程度和固砂强度 ,并进一步筛选出适用于中低温油水井的固砂剂配方。