开孔板连接件剪切受力机理的试验研究

提出新的开孔板连接件抗剪承载力测试方法.共进行七组21个试件试验,测试开孔板连接件的荷载-滑移关系,观测开孔板连接件的破坏形态.结果表明:每组试件的荷载-滑移曲线重复性较好,验证了本文提出的测试方法的合理性.根据试验结果,分析开孔板连接件的破坏性质及影响开孔板连接件抗剪承载力的因素.     

Closure technique for the hybrid girder cable stayed bridge of Edong Bridge

Based on Edong Yangtze River Bridge, which is the second longest hybrid girder cable stayed bridge with 926 m long main span, the influencing factors and crucial techniques of the main span closure method for long span hybrid girder cable stayed bridge are studied. After theoretical analysis, numerical evaluation and practical test, the loading assistant closure method is employed in Edong Yangtze River Bridge. The loading assistant closure method, with better thermal adaptability and less influence on bridge line and the forced status, can meet the requirements of the unstressed state control method. Based on the mentioned advantages, the loading assistant closure method is applicable to long span hybrid girder cable stayed bridges. The conclusion can provide a reference for the further design of the similar bridges.     

基于共生理论的厦金旅游合作分析

厦门与金门是闽台交流与合作的口岸城市,拥有良好的旅游合作条件。运用生态学中的共生理论,对厦金旅游合作进行共生理论的适用性分析,并对厦金旅游合作的共生三要素共生单元、共生模式及共生环境进行分析。明确对称互惠共生关系及一体化共生模式的旅游合作选择是厦金旅游合作的发展方向及最终的发展目标。     

钢筋砼箱肋拱桥加固技术的应用及探讨

针对某钢筋混凝土箱肋拱桥出现的裂缝,应用一些常用的加固技术进行结构加固,并对其机理作分析探讨.     

对<公路桥涵施工技术规范>中有关泥浆问题的商榷

分析了《公路桥涵施工技术规范 (JTJ0 4 1-2 0 0 0 )》中在泥浆理论、测试和组成配方等方面存在的问题 ,提出了改进建议     

无伸缩缝预应力T梁桥梁高优化设计

结合福建省永春县上坂大桥的结构设计与桥梁通用设计图纸,采用桥梁设计软件,建立不同跨径和梁高的两等跨无伸缩缝预应力T梁桥模型;提出一个同时考虑受力性能和造价的优化设计方法;根据该方法得出各种常用跨径的无伸缩缝T梁桥最优的主梁高度,为无伸缩缝桥梁的优化设计提供参考.     

填石压浆混凝土在桥梁桩基中的应用

总结了高效轻型钻井机配合２ ＳＮＳ注浆泵施工填石压浆混凝土群桩桩基的原理和工艺流程，以及填石压浆混凝土新结构的材料配合比，并将此成功地应用于光山赵桥中桥工程．在取得有关试验数据的基础上，进行了新老工艺的技术和经济指标比较．     

浅析东胜景观大桥大体积混凝土施工

为满足设计要求,避免产生温度裂缝,确保大桥的使用寿命和运行安全,陕西秦地建设有限公司联合科研单位对承台大体积混凝土进行了温度场及应力场仿真计算,根据计算结果制定了不出现有害温度裂缝的温控标准及相应的温控措施以保证工程质量。     

On site tests to estimate aquifer permeability of drainage area of south caisson anchorage construction of Taizhou Bridge

During the construction of the south caisson anchorage of Taizhou Bridge, the drainage area is located in the lower reaches of the Yangtze River and the permeability of stratums there is considerable. In order to maintain progress and guarantee safety during the sinking of the caisson, water should be drained in the initial period. Subsequently, detailed information about the aquifer permeability is required to make sure that the drainage will proceed successfully, which consequently necessitates the on-site estimation of the aquifer permeability in the drainage area. Therefore, the traditional pumping test and slug test are implemented respectively on site. The comparison of computational results of these two tests indicates that they are consistent overall. Notwithstanding, as slug test can be conducted with portable facilities in a short time and the manipulation is easy and few people need to be involved, the advantages of slug test is conspicuous compared with the traditional pumping test. It could be speculated that slug test will gain a prevalent application in the measurement of aquifer permeability in the future.     

Technical Research on Control of Caisson Construction for the Middle Tower Foundation of Taizhou Bridge

The real-time informational monitoring system is adopted in the construction of middle tower foundation of Taizhou Bridge for the first time. The geometric state of the caisson, the stress of upstream and downstream anchorage cables, underwater topography, the drag forces of the caisson cutting edge and frictional resistances of the sidewall and etc. are monitored in real time. According to the synthesized data analysis and decision-making system, the spatial states of the caisson are adjusted in time to locate and embed the deep water caisson precisely. The offset error of the caisson is less than 30 cm and the vertical error is 1/363 at the final stage. The control technology for construction of large caisson under deep water is concluded and would be helpful for the construction of bridge foundation in the future.