CFG桩工程施工方法

介绍了CFG桩的施工方法,针对该工程特点制定了质量保证措施及安全生产、环境保护的具体要求,以期为今后施工奠定良好的基础。     

软土地基水泥土搅拌桩的施工及质量控制

介绍了采用水泥土搅拌桩成功解决浙江乌沙山沿海软土地基加固的建筑施工问题．详细地阐述了水泥土搅拌桩施工工艺流程、方法、质量标准及要求．给出了控制质量的具体做法.     

EXISTENCE AND UNIQUENESS OF ENDEMIC STATES FOR THE AGE-STRUCTURED SEIR EPIDEMIC MODEL

An age-structured SEIR epidemic model of a vertically as well as horizontally transmitteddisease is investigated.Threshold results for the existence of endemic states are established for mostcases.Under certain conditions,uniqueness is also shown.Threshold used are explicitly computablein term of demographic and epidemiological parameters of the model.     

Theoretical Permeability of Two-layered Nonwoven Geotextiles

The two-layered nonwoven geotextile, which consists of a layer constructed with fine fibers for providing optimal filtration characteristics and another layer constructed with coarse fibers for providing the required mechanical properties, is desirable for drainage and filtration system. Based on Darcy＇s law and drag force theory, a mathematical model on vertical permeability coefficient of two-layered nonwoven geotextile is estabilished. Comparison with experimental results shows that the present model possesses 83.6% accuracy for needle-punched two-layered nonwoven geotextiles. And experimental results also show that with the increasing of needle density the vertical permeability coefficient of two-layered nonwoven geotextiless firstly decreases and then increases, reaching the smallest value at 470 p/cm^2.     

固定塔式起重机基础结构类型及实例

为解决在广州老城区内复杂的地质及狭窄的施工环境条件下安装固定塔式起重机，介绍多种结构形式的基础类型及实例．其中混凝土单桩基础承台结构作为塔式起重机的安装平台在老城区建筑密集区域的施工中值得推广。     

半刚性桩复合地基几个问题的探讨

文章对水泥土桩的变形模量、水泥土桩及CFG桩的桩间土应力发挥系数β，进行了试验研究及理论分析。     

某住宅小区住宅楼桩基础设计

结合实际工程，论述了桩基础结构的形式、应用范围、设计原则、设计理论及方法、步骤和应考虑的因素，并由此设计出经济合理的桩基础．总结出设计规律．     

粉喷桩在软土地基中的应用

介绍了粉喷桩在高等级公路设计与施工中的应用,论述了深层搅拌法中最常用的一种方法——水泥粉喷桩的施工技术。     

引入三维接触单元模拟冻土与桩共同工作

运用虚位移原理推导出三维非线性接触单元的等效单元刚度一约束矩阵;通过建立冻土地基的热弹塑性-蠕变增量应力应变关系及几何方程得出冻土地基的热弹塑性-蠕变单元平衡方程。根据桩土共同作用的工作特性,通过引入非线性接触单元将冻土地基的热弹塑性蠕变非线性有限元计算模式与混凝土桩联系起来,建立了冻土区桩土共同作用的热弹塑性蠕变非线性有限元计算模型,通过模型计算结果与实测比较表明,该计算模型能较好地体现桩冻土共同工作性能。     

湿陷性黄土地区火力发电厂地基处理方案优化

文章通过对某电厂湿陷性黄土地区地基处理方案比较,提出了几种适宜某电厂主厂房在湿陷性黄土地区的地基处理方案。通过分析比较,确定选用钢筋混凝土预制桩。